Acoustics—Measurements of sound insulation in buildings and of building elements—Part 4:Field measurements of airborne sound insulation between rooms
Some standard content:
S 91.120.30
National Standard of the People's Republic of China
CH/T:19889:4—2005/IS0 140-4:1998 AcousticsMeesurement of sound insulation in buildings and of building clements-Part 4, Field measurements of airborte sound insulation between roomrs(ISO 140-4:1998,IET)
Published on September 9, 2005
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on April 1, 2006
GB/T 19889.4-—2005/IS0 14-4:1998 Pre-treatment
Regulatory documents
Terms and definitions
Measurement equipment
Test arrangements
Test methods and calculations
Generation of sound pressure in the sound source room
6.3 Average sound pressure level
6.1 Measurement range
6.1 Standard sound pressure level measurement and estimation of equivalent sound absorption base
6.6 Performance
Results presentation
Test report
Appendix A (Normative comparison) Technical requirements and layout of sound sources A.1 Technical requirements for the location of sound sources and microphone cabinets A.2 Selection of the most efficient Appendix (informative appendix) Method of measuring sound insulation according to the plan H.1 Measurement of sound source location B.2 Generation of sound source field B.4 Model of sound absorption rate B.5 Measurement of sound impact time and estimation of equivalent absorption rate B.6 Expression of results (informative appendix) Recording (informative appendix) .2 Minimum area D.3 Sound field samples D.4 Measurement of sound field by device location, average time D. Reverberation time
reverberation resistance (data quality) The results of the test are as follows:
Part 1: Laboratory test requirements for the transmission of suppressed sound: Part 2, Determination, verification and application of data; Part 3: Laboratory quality of building airborne sound; Part 4: Field measurement of the air between rooms Part 5: Field measurement of the air produced by external components and external walls: Part 6, Test case for the exposure of heavy panels to external noise, Part 1, the two versions of the necessary measurements of sound production GB/T 19889.42005/1S0 140-4:1998-Part 3; Heavy-duty standard floor covering impact test by industry standard 6B/T19889 Part 4, Standard for use with [5) 140-:1996 Industrial and academic sound insulation measurement of building components
Part 4, Field measurement of air between rooms This part is in accordance with the requirements of national standards, and [8] 141)-4:9 has made a supplementary figure of this part A and Appendix III for the current standard, Appendix A, Appendix B for the current standard, Appendix C for the current standard, Appendix D for the current standard, Appendix D for the current standard, Appendix D for the current standard, Appendix D for the current standard, Appendix D for the current standard, and Appendix D for the current standard. This part is proposed by the Chinese Academy of Sciences.
This part is proposed by the National Standardization Technical Committee SAC/TC_ This standard was drafted by Southeast University, Nanjing University, Tongji University, and the main drafters of this standard are Liu Xiaoyong, Wu Zixue, Mao Xi, Zou Juzhang, and Hui Li. 1 Standard
G3/7:19389.4—2005/TS0 140-4:1988 Acoustics - Sound insulation of buildings and building elements - Part 4: Field measurement of airborne sound insulation between rooms This part of G319889 specifies the method for on-site measurement of the airborne sound insulation of walls, floors and doors between rooms under extended conditions, in order to provide the user with accurate data on the effect of the sound insulation. The northern tooth gives the word air fan sound volume as the measured rate: GB/T5(121, the sound insulation setting can be converted into a table of characteristics and the measurement results can be used to compare the network performance between rooms, so as to compare the actual room production with the regulatory requirements. 1: The test rate inertia of the building components can be found in 19x, 2005. 2. The measurement of both the external wall components and the external air can be found in GR/T19383, 5205, 2. The specifications refer to the following documents and become the clauses of this part through the reference of this part. Note: References to dated documents, their subsequent revisions (excluding errors) or sub-editions do not apply to this part. However, the latest revisions of these documents may be discontinued based on the agreement reached with this part. Documents with a date of 0:0 ... d: 1E60864:035)(.5T19889.22005 Acoustics: Noise measurement of buildings and connected components Part 3: Determination of potential, inspection and use 1S) 140-: 1991.
Issued/19889.32005 Acoustic sound measurement of single buildings and components Part 3: Laboratory measurement of airborne sound of connected structures (: 1
B/153-2200 Building evaluation standards
150354: 1985 Acoustic measurement range
3 Terms and definitions||tt ||The following definitions apply to this standard.
Average sound pressure level in roomAveragesnnndpressurelevelinarn(m2)The ratio of the spatial and temporal average of the three pressure levels to the square of the first standard (2) multiplied by 10. The average sound pressure level in the room refers to the entire room, and does not include any area (such as the surface) that has a significant impact on the measurement result. The average sound pressure level in the room is expressed as: 1B.
In the actual measurement room or room, if a sound source is placed, the formula 1) is given as: r)aB
GB/T 19B89.4—2005/IS0 140-4:1998 Where:
the sound pressure level at an undetected point in a room, leveldirfernee
the sound pressure level difference
when there are one or more noises in one of the two rooms, the difference in the sound pressure between the two rooms, expressed in dB, is given by formula 2):
where:
the average sound pressure level in the sound chamber, the first part is decibel (dB), L, — the average sound pressure level in the receiving room, the second part is decibel (dB). 3.3
normalized sound pressure level
The sound pressure difference
is the sound pressure difference in the receiving room, expressed in terms of frequency, and is given by the formula (4): AdB
n, = -1/2 dB
n,
n sound pressure level difference, unit:
A-sound pressure difference at the receiving room, unit: m), A,
n sound pressure level, unit: square meter (For rooms of similar size: A = 0 m). The standardized sound pressure level
kStandardized kevel difference is the sound pressure difference in the receiving room after the entire response time, expressed in B, and is given by the formula (4): Tas
Dt = DI 70's T
Where,
-sound pressure level difference, unit: decibel (αB);
n sound pressure level difference, unit: decibel (αB);
n sound pressure level difference, unit: second! Reference filter response time, for the fixed, T: = 0.55. (2)
(4)
Note 1, according to the treatment time centripetal. ) *, the standard of the difference is to consider the furniture of the house, its response time is basically independent of the room volume and the number of cars, and according to the center. If the narrow room and the child are not used, the standard pressure difference D is related to the direction of the sound. Note that the standard sound pressure level of the room is equivalent to 3. The standard sound pressure level of the room is equal to 10. The unit of A is:
V, the narrow room is 5 square meters (m), 3.5
ftippaurent suund redaetian index stock sound insulation panel
The sound power of the sound power projected onto the ceiling is: the ratio of the sound power of the receiving room to the sound power of the receiving room is multiplied by 10. If, in addition to the transmission through the partition wall itself, the sound power W projected onto the ground component. It is relatively obvious that the calculation expressed in terms of industry is given by formula [5]:
R=10gw+W
Note 1: W, the solution is as shown in the attached figure.
So: "sound volume" is sometimes also called "cover loss". GB/T 19889,4-20DS/1SO 140-4,1996 Note 3: "Generally speaking, the power of the incoming sound is calculated by the part of the sound radiation rate, including the sound volume in the same room: the performance of the two outputs can be calculated by formula (6):
where:
sound pressure difference, unit is decibel dB1;
full surface, single is parallel meter (m\): 1
push the sound volume of the receiving room, single space is square). ti
the partition of the car is fixed, and when it is included in the actual door cabinet opening area, the remaining additional sound radiation through the door can be left out. If the adjacent rooms are staggered or the height is different, $ is the common surface of the two rooms. If the area of some parts is less than 10m, then the research will allow the path to be measured. The notice states that at this time 5 turns ($V/7.> in the larger position!:, where V is the receiving room 1 and the smaller room is the return) the area, unit m, is the common isolation area, then the measured sound level is used to verify the sound level of the laboratory. For the correct sound level, the sound transmission to the receiving space is related to the sound dynamic rate of the public partition, but has nothing to do with the appropriate radiation conditions of the world. If both rooms are expanded, the measurement direction of the sound level reduction in the room is the same. 4 Test equipment
The test equipment should meet the requirements of Section 5, and the production pressure level measurement equipment should comply with GB/T3785-1983 and GB/T17181-19 The accuracy requirements of Type 0 absorption and Type 1 absorption specified in GB/T 15171-771 shall be met. If the equipment manufacturer has other instructions, the entire measuring system including the transmitter shall be calibrated before each measurement using a calibrator that meets the Class 1 accuracy requirements specified in GB/T 15173-199<. In addition to the calibrated sound meter for sound field reduction, the diffuse sound source shall also be calibrated. The acoustic wave generator shall comply with the requirements of GB/T 241-J!!8, and the visual response time measurement equipment shall comply with the requirements specified in 1M) 314,198. The requirements for sound sources are given in 6.2 and Appendix A. 5 Test the sound source in two rooms with the same shape and size. It is best to add a diffuser (such as several pieces of furniture and building panels) in each room. ). The height of the receiver shall be at least 1.0 m. A 34-meter filter can be used. 6 Test methods and calculations
6.1 General www.bzxz.net
Unless the unit is specified in octave bands, the airborne sound field shall be measured in 1/3 octave bands. The method of measuring in octave bands is specified in Appendix B. The single-value evaluation quantity converted from the octave band result cannot be directly compared with the result of 1/3 octave band conversion. 6.2 Generation of source sound field
The sound field generated by the source shall be calibrated and have a consistent spectrum within the test frequency range. If a filter is used, a bandwidth of at least 1/3 of the rated frequency shall be used. If a broadband filter is used, its shape shall ensure sufficient signal ratio in the indoor frequency band (it is recommended to use a broadband filter). In both cases, the sound pressure level of the source frequency within the specified 1/3 range is not allowed. The power of the sound source should be high enough so that the sound pressure panel in the receiving room at any frequency shall be at least 1CB higher than the maximum sound pressure at the back. If this is not the case, corrections shall be made.
If the sound source is not in the same room, the speakers shall be operated in phase or their radiation shall be uniform and non-directional (see A.1.3): Multiple sources may be detected simultaneously, provided they are of similar type and are operated with the same but not identical dimensions. When using a single source, the minimum number of sound sources shall be: if two rooms are required, the area shall be the same. In the calculation of the GR/T19889.--20C5/[S0 14D-4:1998 Standard for the use of sound source rooms, this section requires the use of the following methods: (When calculating the sound, only the test results in one direction or two directions can be used. That is, the device is located in the same room, or the source room and the receiving room are exchanged in the same direction for repeated testing, and multiple source locations are selected in the same room. The device should be placed in a position that makes the sound as far as possible, and be kept away from the distribution and transmission of the room and the components that affect the product, so that the radiation is in the environment and components. 1. The sound pressure level of the room mainly depends on: the type of sound source; the location of the sound source; the technical requirements of the sound source and its location shall be determined according to the method of recording. 6.3 Average sound pressure level measurement
6.3.1 General
The average sound pressure level can be obtained by measuring the sound pressure level of the sound source in the room with only one sound source, except for a certain special sound source or a continuous or rotating sound source. The sound pressure level measured by the sound source in the same position shall be the average value of all the sound pressure levels in the room.
6. 3.2 Transmitter Positions
Minimum measurement of each transmitter position:
The distance between any transmitter and the room boundary or the body of the transmitter is 0.5ms. Any position must be within the range of 0.0m. If possible, a larger limit should be imposed.
) There should be at least five microphone positions at the same transmitter position and they should be spaced in the same area as the transmitter. 5) When using movable transmitters, the scanning radius should be at least 0.0m. 6.3.3 Measurement of ambient pressure of a single sound source
Use the microphone to mark the point and record at least 10 times (for example, each microphone point should be measured once per location). When using a mobile microphone, measure at least twice at each corresponding microphone location! If a sound source is used, measure at least five times at the designated microphone point:
Use a real microphone to measure at least -10 times.
6.3.4 Averaging time
For each microphone position. For low frequency, the average time of each half-average band shall be at least: 5: For high frequency, the average time shall not be less than 4≤. When using mobile microphones, the average time shall not be less than the average time of the whole sweep.
5.4 Frequency range of measurement
The sound pressure level of the wind shall be measured in 1:3 octaves. It shall include at least the following frequency bands, with a single space of II2:
In order to obtain more information and compare it with the results obtained by the experiment carried out according to G3/T1985S.? 2J35, the sweep range shall be expanded to 1/octave of the following center frequency, 430 00
If it is necessary to use the low illumination range of the electrical position, the following [frequency band center frequency, unit: ! x：306380
For this kind of frequency band, the additional requirements are as follows. E.5 Reverberation time measurement and equivalent sound absorption estimation GB/T19889.4—2005/1S1140-4:1998 In formula (6), the equivalent sound absorption is calculated according to the formula (7): 4-0. le v
A——absorption capacity, unit (m).
Reception room volume, unit is!
T-· Visual time single sand:.
According to [534, source science f. market people record) 1: after the start of the decay mountain practice calculation mixed single time gate, or in the decay of the classic war from the sound pressure slow than the competition start low decibel plastic calculation, then the change can not be less than ", nor too large so that the rapid change can not approach three one self line, the single industry mountain system should be less than ten high forbidden sound level 1U. List ten mother decay practice, to match at least mother large. For one situation, at least one speaker position and three market positions each measuring point needs two readings.
The mobile device required by 3.4.2 can pass the average noise level of 8.6.6 in the room to ensure that it is still in the technical industry. If the outdoor noise is improved, the receiving system should be more strict with the noise source and the receiving system should be more than 6B lower than the total sound pressure level difference. The correction of the level can be obtained by formula (>: I. - 1c1g(10.-*.0--. d
——corrected signal level.The single signal is expressed in dB (dB); the total level of the superposition of the signal and the back noise is expressed in decibels (Lh
back noise, single signal is expressed in decibels (
). If the sound level in the excitation band is lowered or decreased by a small amount, the 6R value shall be used for correction. In this case, the measurement report shall clearly state the limit value of the R part of the quantity (Chapter 5, Chapter 9)). 7 precision
or program room has enough repetition according to G/19880.3-20C5 to determine the special state of the mountain method or the equipment has a change when the need for calibration
8 result expression
room with the same air sound insulation mountain is the book of the big reach, the production method will have a measurement rate of the creative standard Lu Gong version of the difference between the standard production not version of the examination model table bar this measurement scale efficiency tube technology accurate to the decimal point surface registration, and in the form and internal system of the shape or age use: measurement form report convex The graph shows the relationship between the decibel position and the heat rate of the teaching scale, and uses the following table: 1/20 mm table:
20 small table 10
It is recommended to use the appendix small table form. This concise form lists all the test objects, test methods and more important information.
When the D or R value is calculated from the 3 times frequency band of the test station, the D or R value is displayed using the public register (11): Calculate Da =— 10lg[
GB/T19889.4—2005/ISO140-4:1996Dao --10lgl
10 S,/
R - 1ele( g
The test length shall be in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit for the test according to this part of GB/T19889.
Name and address of the entrusting organization or individual;
Planning test period:
Building structure and test bridge (west)
The volume of the rooms inside
Select appropriate evaluation quantities, such as the standardized sound level adjustment D between the purchase rooms, or the standard pressure level difference D. The apparent sound level R must be expressed and the relationship between the sound performance of the increase and the frequency must be expressed. Calculate the isolation area S of R.
Overview of the test method:
Explanation of the test results that are defined as the measurement limit. When the corresponding sound level of a certain problem cannot be measured due to background noise (acoustic or electrical, see 6.6 of the standard), it should be reported in the form of D, D or R'2dB: Use the same form as R to inquire about the transmission. [If the measurement is more detailed (Appendix C): it should be stated as clearly as possible that the sound energy transmitted by some components is included in the measurement scene. According to the curves D.1), D.(f) and R'(f), calculate the single value evaluation quantity, see GB/T 50121:2005, and clearly state that the calculation is the basic on-site measurement value. Appendix A (Normative Appendix) Technical requirements and layout of power sources A, 1 Technical requirements for the relative position of loudspeakers and microphones A 1. 1 General GB/T 19589.4--2005/1SO 140-4:1998 The purpose of these requirements is to spread the market measured by sensors in the power source room as much as possible. The location and orientation of the microphones should be such that the microphones are located outside the direct sound field and that the sound energy directly projected by the sound source to the environment, the floor and the ceiling, which are interfaces that affect the transmission of the sound source, does not exceed the dominant position. The requirements for the radiation characteristics of the sound source depend on the size of the sound source room. If a uniform non-directional radiation sound source that meets the requirements of A.3.3 is used, the requirements listed in 6.3.2 should be met. A:1.2 Relative position of microphones and microphones! Ensure that the microphones are located outside the direct sound field. Each fixed microphone position should be located in an area where the distance from the source to the sound source is significantly reduced.
When using a directional radiating sound source, the distance from the microphone shall not be less than 1 meter. II6.3.2), for the sound source, when the membrane diameter of the transmitter is close to the source, the sound pressure will increase. A.1.3 Test method for the directional performance of loudspeaker boxes: At all locations in an empty room, the loudspeaker unit shall be installed in the box. All speaker units in a room should be radiated in the same direction.
The speakers should be installed in a double-dry polyhedron or a 12-sided triangular shape. It is better to get nearly uniform non-uniform non-directional radiation. Hemispherical speakers (installed on the floor) can also achieve non-directional non-directional radiation in the room. At this time, the vertical test from the lower part of the room to the commercial part is conducted.
The directivity test of the source radiation is to a single sound source in the free field at a positive level of 1.5. Driven by a noise signal, the energy translation value in 3\ is measured in 1/octave band, and the sound pressure level difference between the sliding or average value of all 3\ (->). The directivity index is:
II =LL..
In the range of 1Hz-1Hz, if the DT value is within the limit of =?IT+, it can be considered as a uniform non-indicative emission. In the range of 630z--1Hz, the limit value can be increased by 12B. From the limit value of 100500, the measurement formula is reversed in different planes to ensure that the "worst" case is included. For polyhedral sound sources: testing in one plane is sufficient. 2. Guide to choosing the most accurate sound source position
The radiation characteristics of the loudspeaker and the position of the microphone (or the microphone path in the case of mobile microphones) determine the appropriate placement.
The distance between different loudspeaker placements should be no less than 3.7 m. At least two loudspeakers should be spaced at least 1 m apart, centered between the room boundary and the center of the sound source. For small rooms, the location should not be in the same plane as the room boundary. For actual measurements, the sound source is placed in a small room, with the distance between the room boundary and the sound source meeting the above requirements. The corners of the sound source are and. The possible influence of the lateral transmission of the sound source and the undesirable sound pressure level in the air are considered to be the same.
iB/19889.4--2005/150145-4;1998B.1 General
Appendix B
(Normative reference)
Method of measuring sound insulation by multiples of
For the on-site measurement of the sound generated between two rooms, this part has defined the method of measuring by multiples of /3. However, if it is necessary to determine the measurement of multiples of the sound source, this appendix.D.2 Noise generation by the sound source room The sound produced shall be smooth and without any distortion. This requirement shall be verified by testing the sound source at 1/3 the power level of the proposed test sound source in the ambient temperature. A. The power level of the same 1/octave band shall not exceed 61 in the 125h octave band and not exceed 61 in the 25h signal range. The high frequency signal level of the source shall be at least 2 times the width of the receiver. When using broadband detection, the noise floor can be changed to ensure sufficient signal level in the high frequency band in the receiving room. For other provisions and sound sources, please refer to 2. D.3 Average sound pressure level measurement. The service requirements of the transmission shall be met, such as The location of the device, the microphone scanning measurement path, the reading of the flat groove and the spatial average method are specified.
B.4 Measurement sequence specification
The measurement should use a single less package, the compensation process filter reputation, the unit is H: 12525F0012U
The wide range of the network volume frequency is expanded to +WII2 times the frequency, and the planning results need to be safe. The center frequency is 3H2 times the standard. When such a low-dependence measurement is required, the code in Appendix D should be used. R.5 The estimation of the equivalent sound absorption of the reverberation time shall be carried out according to the method of 6.5. B. 6 The correction of the background noise shall be carried out according to the method of 3.6. 13.7 The precision shall be implemented according to the requirements of Chapter 7. B. If the airborne sound between rooms is expressed to one decimal place, all measured frequencies shall be converted to normalized sound pressure level difference 1). The value of the standardized sound level D- or the apparent sound insulation R is given in the form of a standard line. The correction in the test book should be small! 8
The frequency relationship between the measurement and the effect is as follows: --15mm represents 1 mm smaller;
m represents 0.
G0/13889.4—2005/IS0140-4:1998 If R is tested in the same direction and inversely, the arithmetic mean of all the results of each band shall be calculated.1998 If the same direction and reverse query are used to check R, the arithmetic mean of all the results of the calculation should be calculated.1998 If the same direction and reverse query are used to check R, the arithmetic mean of all the results of the calculation should be calculated.Or R part of the continental limit (5 Chapter 9). 7 Precision
or process word room has enough repetition according to G/19880.3-20C5 to determine the special state of the measurement method or equipment when the change needs to be corrected
8 The result expression
room with the same air sound insulation is the book of the mountain, the production method will have a measurement rate of the original standard Lu Gong version of the difference between the product version of the test model table bar this measurement scale efficiency tube technology accurate to the decimal point surface registration, and in the form and internal system of the shape or age use: measurement format report convex The graph shows the relationship between the decibel position and the heat rate of the teaching scale, and uses the following table: 1/20 mm table:
20 small table 10
It is recommended to use the appendix small table form. This concise form lists all the test objects, test methods and more important information.
When the D or R value is calculated from the 3 times frequency band of the test station, the D or R value is displayed using the public register (11): Calculate Da =— 10lg[
GB/T19889.4—2005/ISO140-4:1996Dao --10lgl
10 S,/
R - 1ele( g
The test length shall be in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit for the test according to this part of GB/T19889.
Name and address of the entrusting organization or individual;
Planning test period:
Building structure and test bridge (west)
The volume of the rooms inside
Select appropriate evaluation quantities, such as the standardized sound level adjustment D between the purchase rooms, or the standard pressure level difference D. The apparent sound level R must be expressed and the relationship between the sound performance of the increase and the frequency must be expressed. Calculate the isolation area S of R.
Overview of the test method:
Explanation of the test results that are defined as the measurement limit. When the corresponding sound level of a certain problem cannot be measured due to background noise (acoustic or electrical, see 6.6 of the standard), it should be reported in the form of D, D or R'2dB: Use the same form as R to inquire about the transmission. [If the measurement is more detailed (Appendix C): it should be stated as clearly as possible that the sound energy transmitted by some components is included in the measurement scene. According to the curves D.1), D.(f) and R'(f), calculate the single value evaluation quantity, see GB/T 50121:2005, and clearly state that the calculation is the basic on-site measurement value. Appendix A (Normative Appendix) Technical requirements and layout of power sources A, 1 Technical requirements for the relative position of loudspeakers and microphones A 1. 1 General GB/T 19589.4--2005/1SO 140-4:1998 The purpose of these requirements is to spread the market measured by sensors in the power source room as much as possible. The location and orientation of the microphones should be such that the microphones are located outside the direct sound field and that the sound energy directly projected by the sound source to the environment, the floor and the ceiling, which are interfaces that affect the transmission of the sound source, does not exceed the dominant position. The requirements for the radiation characteristics of the sound source depend on the size of the sound source room. If a uniform non-directional radiation sound source that meets the requirements of A.3.3 is used, the requirements listed in 6.3.2 should be met. A:1.2 Relative position of microphones and microphones! Ensure that the microphones are located outside the direct sound field. Each fixed microphone position should be located in an area where the distance from the source to the sound source is significantly reduced.
When using a directional radiating sound source, the distance from the microphone shall not be less than 1 meter. II6.3.2), for the sound source, when the membrane diameter of the transmitter is close to the source, the sound pressure will increase. A.1.3 Test method for the directional performance of loudspeaker boxes: At all locations in an empty room, the loudspeaker unit shall be installed in the box. All speaker units in a room should be radiated in the same direction.
The speakers should be installed in a double-dry polyhedron or a 12-sided triangular shape. It is better to get nearly uniform non-uniform non-directional radiation. Hemispherical speakers (installed on the floor) can also achieve non-directional non-directional radiation in the room. At this time, the vertical test from the lower part of the room to the commercial part is conducted.
The directivity test of the source radiation is to a single sound source in the free field at a positive level of 1.5. Driven by a noise signal, the energy translation value in 3\ is measured in 1/octave band, and the sound pressure level difference between the sliding or average value of all 3\ (->). The directivity index is:
II =LL..
In the range of 1Hz-1Hz, if the DT value is within the limit of =?IT+, it can be considered as a uniform non-indicative emission. In the range of 630z--1Hz, the limit value can be increased by 12B. From the limit value of 100500, the measurement formula is reversed in different planes to ensure that the "worst" case is included. For polyhedral sound sources: testing in one plane is sufficient. 2. Guide to choosing the most accurate sound source position
The radiation characteristics of the loudspeaker and the position of the microphone (or the microphone path in the case of mobile microphones) determine the appropriate placement.
The distance between different loudspeaker placements should be no less than 3.7 m. At least two loudspeakers should be spaced at least 1 m apart, centered between the room boundary and the center of the sound source. For small rooms, the location should not be in the same plane as the room boundary. For actual measurements, the sound source is placed in a small room, with the distance between the room boundary and the sound source meeting the above requirements. The corners of the sound source are and. The possible influence of the lateral transmission of the sound source and the undesirable sound pressure level in the air are considered to be the same.
iB/19889.4--2005/150145-4;1998B.1 General
Appendix B
(Normative reference)
Method of measuring sound insulation by multiples of
For the on-site measurement of the sound generated between two rooms, this part has defined the method of measuring by multiples of /3. However, if it is necessary to determine the measurement of multiples of the sound source, this appendix.D.2 Noise generation by the sound source room The sound produced shall be smooth and without any distortion. This requirement shall be verified by testing the sound source at 1/3 the power level of the proposed test sound source in the ambient temperature. A. The power level of the same 1/octave band shall not exceed 61 in the 125h octave band and not exceed 61 in the 25h signal range. The high frequency signal level of the source shall be at least 2 times the width of the receiver. When using broadband detection, the noise floor can be changed to ensure sufficient signal level in the high frequency band in the receiving room. For other provisions and sound sources, please refer to 2. D.3 Average sound pressure level measurement. The service requirements of the transmission shall be met, such as The location of the device, the microphone scanning measurement path, the reading of the flat groove and the spatial average method are specified.
B.4 Measurement sequence specification
The measurement should use a single less package, the compensation process filter reputation, the unit is H: 12525F0012U
The wide range of the network volume frequency is expanded to +WII2 times the frequency, and the planning results need to be safe. The center frequency is 3H2 times the standard. When such a low-dependence measurement is required, the code in Appendix D should be used. R.5 The estimation of the equivalent sound absorption of the reverberation time shall be carried out according to the method of 6.5. B. 6 The correction of the background noise shall be carried out according to the method of 3.6. 13.7 The precision shall be implemented according to the requirements of Chapter 7. B. If the airborne sound between rooms is expressed to one decimal place, all measured frequencies shall be converted to normalized sound pressure level difference 1). The value of the standardized sound level D- or the apparent sound insulation R is given in the form of a standard line. The correction in the test book should be small! 8
The frequency relationship between the measurement and the effect is as follows: --15mm represents 1 mm smaller;
m represents 0.
G0/13889.4—2005/IS0140-4:1998 If R is tested in the same direction and inversely, the arithmetic mean of all the results of each band shall be calculated.Or R part of the continental limit (5 Chapter 9). 7 Precision
or process word room has enough repetition according to G/19880.3-20C5 to determine the special state of the measurement method or equipment when the change needs to be corrected
8 The result expression
room with the same air sound insulation is the book of the mountain, the production method will have a measurement rate of the original standard Lu Gong version of the difference between the product version of the test model table bar this measurement scale efficiency tube technology accurate to the decimal point surface registration, and in the form and internal system of the shape or age use: measurement format report convex The graph shows the relationship between the decibel position and the heat rate of the teaching scale, and uses the following table: 1/20 mm table:
20 small table 10
It is recommended to use the appendix small table form. This concise form lists all the test objects, test methods and more important information.
When the D or R value is calculated from the 3 times frequency band of the test station, the D or R value is displayed using the public register (11): Calculate Da =— 10lg[
GB/T19889.4—2005/ISO140-4:1996Dao --10lgl
10 S,/
R - 1ele( g
The test length shall be in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit for the test according to this part of GB/T19889.
Name and address of the entrusting organization or individual;
Planning test period:
Building structure and test bridge (west)
The volume of the rooms inside
Select appropriate evaluation quantities, such as the standardized sound level adjustment D between the purchase rooms, or the standard pressure level difference D. The apparent sound level R must be expressed and the relationship between the sound performance of the increase and the frequency must be expressed. Calculate the isolation area S of R.
Overview of the test method:
Explanation of the test results that are defined as the measurement limit. When the corresponding sound level of a certain problem cannot be measured due to background noise (acoustic or electrical, see 6.6 of the standard), it should be reported in the form of D, D or R'2dB: Use the same form as R to inquire about the transmission. [If the measurement is more detailed (Appendix C): it should be stated as clearly as possible that the sound energy transmitted by some components is included in the measurement scene. According to the curves D.1), D.(f) and R'(f), calculate the single value evaluation quantity, see GB/T 50121:2005, and clearly state that the calculation is the basic on-site measurement value. Appendix A (Normative Appendix) Technical requirements and layout of power sources A, 1 Technical requirements for the relative position of loudspeakers and microphones A 1. 1 General GB/T 19589.4--2005/1SO 140-4:1998 The purpose of these requirements is to spread the market measured by sensors in the power source room as much as possible. The location and orientation of the microphones should be such that the microphones are located outside the direct sound field and that the sound energy directly projected by the sound source to the environment, the floor and the ceiling, which are interfaces that affect the transmission of the sound source, does not exceed the dominant position. The requirements for the radiation characteristics of the sound source depend on the size of the sound source room. If a uniform non-directional radiation sound source that meets the requirements of A.3.3 is used, the requirements listed in 6.3.2 should be met. A:1.2 Relative position of microphones and microphones! Ensure that the microphones are located outside the direct sound field. Each fixed microphone position should be located in an area where the distance from the source to the sound source is significantly reduced.
When using a directional radiating sound source, the distance from the microphone shall not be less than 1 meter. II6.3.2), for the sound source, when the membrane diameter of the transmitter is close to the source, the sound pressure will increase. A.1.3 Test method for the directional performance of loudspeaker boxes: At all locations in an empty room, the loudspeaker unit shall be installed in the box. All speaker units in a room should be radiated in the same direction.
The speakers should be installed in a double-dry polyhedron or a 12-sided triangular shape. It is better to get nearly uniform non-uniform non-directional radiation. Hemispherical speakers (installed on the floor) can also achieve non-directional non-directional radiation in the room. At this time, the vertical test from the lower part of the room to the commercial part is conducted.
The directivity test of the source radiation is to a single sound source in the free field at a positive level of 1.5. Driven by a noise signal, the energy translation value in 3\ is measured in 1/octave band, and the sound pressure level difference between the sliding or average value of all 3\ (->). The directivity index is:
II =LL..
In the range of 1Hz-1Hz, if the DT value is within the limit of =?IT+, it can be considered as a uniform non-indicative emission. In the range of 630z--1Hz, the limit value can be increased by 12B. From the limit value of 100500, the measurement formula is reversed in different planes to ensure that the "worst" case is included. For polyhedral sound sources: testing in one plane is sufficient. 2. Guide to choosing the most accurate sound source position
The radiation characteristics of the loudspeaker and the position of the microphone (or the microphone path in the case of mobile microphones) determine the appropriate placement.
The distance between different loudspeaker placements should be no less than 3.7 m. At least two loudspeakers should be spaced at least 1 m apart, centered between the room boundary and the center of the sound source. For small rooms, the location should not be in the same plane as the room boundary. For actual measurements, the sound source is placed in a small room, with the distance between the room boundary and the sound source meeting the above requirements. The corners of the sound source are and. The possible influence of the lateral transmission of the sound source and the undesirable sound pressure level in the air are considered to be the same.
iB/19889.4--2005/150145-4;1998B.1 General
Appendix B
(Normative reference)
Method of measuring sound insulation by multiples of
For the on-site measurement of the sound generated between two rooms, this part has defined the method of measuring by multiples of /3. However, if it is necessary to determine the measurement of multiples of the sound source, this appendix.D.2 Noise generation by the sound source room The sound produced shall be smooth and without any distortion. This requirement shall be verified by testing the sound source at 1/3 the power level of the proposed test sound source in the ambient temperature. A. The power level of the same 1/octave band shall not exceed 61 in the 125h octave band and not exceed 61 in the 25h signal range. The high frequency signal level of the source shall be at least 2 times the width of the receiver. When using broadband detection, the noise floor can be changed to ensure sufficient signal level in the high frequency band in the receiving room. For other provisions and sound sources, please refer to 2. D.3 Average sound pressure level measurement. The service requirements of the transmission shall be met, such as The location of the device, the microphone scanning measurement path, the reading of the flat groove and the spatial average method are specified.
B.4 Measurement sequence specification
The measurement should use a single less package, the compensation process filter reputation, the unit is H: 12525F0012U
The wide range of the network volume frequency is expanded to +WII2 times the frequency, and the planning results need to be safe. The center frequency is 3H2 times the standard. When such a low-dependence measurement is required, the code in Appendix D should be used. R.5 The estimation of the equivalent sound absorption of the reverberation time shall be carried out according to the method of 6.5. B. 6 The correction of the background noise shall be carried out according to the method of 3.6. 13.7 The precision shall be implemented according to the requirements of Chapter 7. B. If the airborne sound between rooms is expressed to one decimal place, all measured frequencies shall be converted to normalized sound pressure level difference 1). The value of the standardized sound level D- or the apparent sound insulation R is given in the form of a standard line. The correction in the test book should be small! 8
The frequency relationship between the measurement and the effect is as follows: --15mm represents 1 mm smaller;
m represents 0.
G0/13889.4—2005/IS0140-4:1998 If R is tested in the same direction and inversely, the arithmetic mean of all the results of each band shall be calculated.3—20C5 gives the mountain's method of determining the special state of the state step measurement method or the equipment has a change when the need for calibration
8 results expression
room between the air sound insulation mountain is the book of the big reach, the production method will have a measurement rate of the original standard Lu Gong version of the difference between the standard production version of the test model table bar insulation scale efficiency tube technology accurate to the decimal point surface registration, and in the form of a table and the internal system or age use: measurement format report convex diagram virtual representation of the decibel position analysis of the teaching scale The heat rate relationship is shown below: 1/20 mm table:
20 small table 10
It is recommended to use the appendix small table form. This concise form lists all the test objects, test methods and more important information.
When calculating the D of the 3-fold frequency band from the test station, D or R value is shown in the public register (): 11) Calculate Da =— 10lg[
GB/T19889.4—2005/ISO140-4:1996Dao --10lgl
10 S,/
R - 1ele( g
The test length shall be in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit for the test according to this part of GB/T19889.
Name and address of the entrusting organization or individual;
Planning test period:
Building structure and test bridge (west)
The volume of the rooms inside
Select appropriate evaluation quantities, such as the standardized sound level adjustment D between the purchase rooms, or the standard pressure level difference D. The apparent sound level R must be expressed and the relationship between the sound performance of the increase and the frequency must be expressed. Calculate the isolation area S of R.
Overview of the test method:
Explanation of the test results that are defined as the measurement limit. When the corresponding sound level of a certain problem cannot be measured due to background noise (acoustic or electrical, see 6.6 of the standard), it should be reported in the form of D, D or R'2dB: Use the same form as R to inquire about the transmission. [If the measurement is more detailed (Appendix C): it should be stated as clearly as possible that the sound energy transmitted by some components is included in the measurement scene. According to the curves D.1), D.(f) and R'(f), calculate the single value evaluation quantity, see GB/T 50121:2005, and clearly state that the calculation is the basic on-site measurement value. Appendix A (Normative Appendix) Technical requirements and layout of power sources A, 1 Technical requirements for the relative position of loudspeakers and microphones A 1. 1 General GB/T 19589.4--2005/1SO 140-4:1998 The purpose of these requirements is to spread the market measured by sensors in the power source room as much as possible. The location and orientation of the microphones should be such that the microphones are located outside the direct sound field and that the sound energy directly projected by the sound source to the environment, the floor and the ceiling, which are interfaces that affect the transmission of the sound source, does not exceed the dominant position. The requirements for the radiation characteristics of the sound source depend on the size of the sound source room. If a uniform non-directional radiation sound source that meets the requirements of A.3.3 is used, the requirements listed in 6.3.2 should be met. A:1.2 Relative position of microphones and microphones! Ensure that the microphones are located outside the direct sound field. Each fixed microphone position should be located in an area where the distance from the source to the sound source is significantly reduced.
When using a directional radiating sound source, the distance from the microphone shall not be less than 1 meter. II6.3.2), for the sound source, when the membrane diameter of the transmitter is close to the source, the sound pressure will increase. A.1.3 Test method for the directional performance of loudspeaker boxes: At all locations in an empty room, the loudspeaker unit shall be installed in the box. All speaker units in a room should be radiated in the same direction.
The speakers should be installed in a double-dry polyhedron or a 12-sided triangular shape. It is better to get nearly uniform non-uniform non-directional radiation. Hemispherical speakers (installed on the floor) can also achieve non-directional non-directional radiation in the room. At this time, the vertical test from the lower part of the room to the commercial part is conducted.
The directivity test of the source radiation is to a single sound source in the free field at a positive level of 1.5. Driven by a noise signal, the energy translation value in 3\ is measured in 1/octave band, and the sound pressure level difference between the sliding or average value of all 3\ (->). The directivity index is:
II =LL..
In the range of 1Hz-1Hz, if the DT value is within the limit of =?IT+, it can be considered as a uniform non-indicative emission. In the range of 630z--1Hz, the limit value can be increased by 12B. From the limit value of 100500, the measurement formula is reversed in different planes to ensure that the "worst" case is included. For polyhedral sound sources: testing in one plane is sufficient. 2. Guide to choosing the most accurate sound source position
The radiation characteristics of the loudspeaker and the position of the microphone (or the microphone path in the case of mobile microphones) determine the appropriate placement.
The distance between different loudspeaker placements should be no less than 3.7 m. At least two loudspeakers should be spaced at least 1 m apart, centered between the room boundary and the center of the sound source. For small rooms, the location should not be in the same plane as the room boundary. For actual measurements, the sound source is placed in a small room, with the distance between the room boundary and the sound source meeting the above requirements. The corners of the sound source are and. The possible influence of the lateral transmission of the sound source and the undesirable sound pressure level in the air are considered to be the same.
iB/19889.4--2005/150145-4;1998B.1 General
Appendix B
(Normative reference)
Method of measuring sound insulation by multiples of
For the on-site measurement of the sound generated between two rooms, this part has defined the method of measuring by multiples of /3. However, if it is necessary to determine the measurement of multiples of the sound source, this appendix.D.2 Noise generation by the sound source room The sound produced shall be smooth and without any distortion. This requirement shall be verified by testing the sound source at 1/3 the power level of the proposed test sound source in the ambient temperature. A. The power level of the same 1/octave band shall not exceed 61 in the 125h octave band and not exceed 61 in the 25h signal range. The high frequency signal level of the source shall be at least 2 times the width of the receiver. When using broadband detection, the noise floor can be changed to ensure sufficient signal level in the high frequency band in the receiving room. For other provisions and sound sources, please refer to 2. D.3 Average sound pressure level measurement. The service requirements of the transmission shall be met, such as The location of the device, the microphone scanning measurement path, the reading of the flat groove and the spatial average method are specified.
B.4 Measurement sequence specification
The measurement should use a single less package, the compensation process filter reputation, the unit is H: 12525F0012U
The wide range of the network volume frequency is expanded to +WII2 times the frequency, and the planning results need to be safe. The center frequency is 3H2 times the standard. When such a low-dependence measurement is required, the code in Appendix D should be used. R.5 The estimation of the equivalent sound absorption of the reverberation time shall be carried out according to the method of 6.5. B. 6 The correction of the background noise shall be carried out according to the method of 3.6. 13.7 The precision shall be implemented according to the requirements of Chapter 7. B. If the airborne sound between rooms is expressed to one decimal place, all measured frequencies shall be converted to normalized sound pressure level difference 1). The value of the standardized sound level D- or the apparent sound insulation R is given in the form of a standard line. The correction in the test book should be small! 8
The frequency relationship between the measurement and the effect is as follows: --15mm represents 1 mm smaller;
m represents 0.
G0/13889.4—2005/IS0140-4:1998 If R is tested in the same direction and inversely, the arithmetic mean of all the results of each band shall be calculated.3—20C5 gives the mountain's method of determining the special state of the state step measurement method or the equipment has a change when the need for calibration
8 results expression
room between the air sound insulation mountain is the book of the big reach, the production method will have a measurement rate of the original standard Lu Gong version of the difference between the standard production version of the test model table bar insulation scale efficiency tube technology accurate to the decimal point surface registration, and in the form of a table and the internal system or age use: measurement format report convex diagram virtual representation of the decibel position analysis of the teaching scale The heat rate relationship is shown below: 1/20 mm table:
20 small table 10
It is recommended to use the appendix small table form. This concise form lists all the test objects, test methods and more important information.
When calculating the D of the 3-fold frequency band from the test station, D or R value is shown in the public register (): 11) Calculate Da =— 10lg[
GB/T19889.4—2005/ISO140-4:1996Dao --10lgl
10 S,/
R - 1ele( g
The test length shall be in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit for the test according to this part of GB/T19889.
Name and address of the entrusting organization or individual;
Planning test period:
Building structure and test bridge (west)
The volume of the rooms inside
Select appropriate evaluation quantities, such as the standardized sound level adjustment D between the purchase rooms, or the standard pressure level difference D. The apparent sound level R must be expressed and the relationship between the sound performance of the increase and the frequency must be expressed. Calculate the isolation area S of R.
Overview of the test method:
Explanation of the test results that are defined as the measurement limit. When the corresponding sound level of a certain problem cannot be measured due to background noise (acoustic or electrical, see 6.6 of the standard), it should be reported in the form of D, D or R'2dB: Use the same form as R to inquire about the transmission. [If the measurement is more detailed (Appendix C): it should be stated as clearly as possible that the sound energy transmitted by some components is included in the measurement scene. According to the curves D.1), D.(f) and R'(f), calculate the single value evaluation quantity, see GB/T 50121:2005, and clearly state that the calculation is the basic on-site measurement value. Appendix A (Normative Appendix) Technical requirements and layout of power sources A, 1 Technical requirements for the relative position of loudspeakers and microphones A 1. 1 General GB/T 19589.4--2005/1SO 140-4:1998 The purpose of these requirements is to spread the market measured by sensors in the power source room as much as possible. The location and orientation of the microphones should be such that the microphones are located outside the direct sound field and that the sound energy directly projected by the sound source to the environment, the floor and the ceiling, which are interfaces that affect the transmission of the sound source, does not exceed the dominant position. The requirements for the radiation characteristics of the sound source depend on the size of the sound source room. If a uniform non-directional radiation sound source that meets the requirements of A.3.3 is used, the requirements listed in 6.3.2 should be met. A:1.2 Relative position of microphones and microphones! Ensure that the microphones are located outside the direct sound field. Each fixed microphone position should be located in an area where the distance from the source to the sound source is significantly reduced.
When using a directional radiating sound source, the distance from the microphone shall not be less than 1 meter. II6.3.2), for the sound source, when the membrane diameter of the transmitter is close to the source, the sound pressure will increase. A.1.3 Test method for the directional performance of loudspeaker boxes: At all locations in an empty room, the loudspeaker unit shall be installed in the box. All speaker units in a room should be radiated in the same direction.
The speakers should be installed in a double-dry polyhedron or a 12-sided triangular shape. It is better to get nearly uniform non-uniform non-directional radiation. Hemispherical speakers (installed on the floor) can also achieve non-directional non-directional radiation in the room. At this time, the vertical test from the lower part of the room to the commercial part is conducted.
The directivity test of the source radiation is to a single sound source in the free field at a positive level of 1.5. Driven by a noise signal, the energy translation value in 3\ is measured in 1/octave band, and the sound pressure level difference between the sliding or average value of all 3\ (->). The directivity index is:
II =LL..
In the range of 1Hz-1Hz, if the DT value is within the limit of =?IT+, it can be considered as a uniform non-indicative emission. In the range of 630z--1Hz, the limit value can be increased by 12B. From the limit value of 100500, the measurement formula is reversed in different planes to ensure that the "worst" case is included. For polyhedral sound sources: testing in one plane is sufficient. 2. Guide to choosing the most accurate sound source position
The radiation characteristics of the loudspeaker and the position of the microphone (or the microphone path in the case of mobile microphones) determine the appropriate placement.
The distance between different loudspeaker placements should be no less than 3.7 m. At least two loudspeakers should be spaced at least 1 m apart, centered between the room boundary and the center of the sound source. For small rooms, the location should not be in the same plane as the room boundary. For actual measurements, the sound source is placed in a small room, with the distance between the room boundary and the sound source meeting the above requirements. The corners of the sound source are and. The possible influence of the lateral transmission of the sound source and the undesirable sound pressure level in the air are considered to be the same.
iB/19889.4--2005/150145-4;1998B.1 General
Appendix B
(Normative reference)
Method of measuring sound insulation by multiples of
For the on-site measurement of the sound generated between two rooms, this part has defined the method of measuring by multiples of /3. However, if it is necessary to determine the measurement of multiples of the sound source, this appendix.D.2 Noise generation by the sound source room The sound produced shall be smooth and without any distortion. This requirement shall be verified by testing the sound source at 1/3 the power level of the proposed test sound source in the ambient temperature. A. The power level of the same 1/octave band shall not exceed 61 in the 125h octave band and not exceed 61 in the 25h signal range. The high frequency signal level of the source shall be at least 2 times the width of the receiver. When using broadband detection, the noise floor can be changed to ensure sufficient signal level in the high frequency band in the receiving room. For other provisions and sound sources, please refer to 2. D.3 Average sound pressure level measurement. The service requirements of the transmission shall be met, such as The location of the device, the microphone scanning measurement path, the reading of the flat groove and the spatial average method are specified.
B.4 Measurement sequence specification
The measurement should use a single less package, the compensation process filter reputation, the unit is H: 12525F0012U
The wide range of the network volume frequency is expanded to +WII2 times the frequency, and the planning results need to be safe. The center frequency is 3H2 times the standard. When such a low-dependence measurement is required, the code in Appendix D should be used. R.5 The estimation of the equivalent sound absorption of the reverberation time shall be carried out according to the method of 6.5. B. 6 The correction of the background noise shall be carried out according to the method of 3.6. 13.7 The precision shall be implemented according to the requirements of Chapter 7. B. If the airborne sound between rooms is expressed to one decimal place, all measured frequencies shall be converted to normalized sound pressure level difference 1). The value of the standardized sound level D- or the apparent sound insulation R is given in the form of a standard line. The correction in the test book should be small! 8
The frequency relationship between the measurement and the effect is as follows: --15mm represents 1 mm smaller;
m represents 0.
G0/13889.4—2005/IS0140-4:1998 If R is tested in the same direction and inversely, the arithmetic mean of all the results of each band shall be calculated./
R - 1ele( g
The test shall be carried out in the positive direction and the arithmetic mean of all test results shall be calculated for each data band. 9 Test report
The test report shall include the following: (1) Name of the testing unit that carried out the test according to this part of GH/T 19889; (2) Name of the testing u
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