This standard specifies the measurement method of the noise level and spectrum of ships radiated in inland waterways and ports to obtain accurate and comparable data. This standard applies to all types of civilian ships in inland waterways and ports, as well as small coastal ships, harbor ships and engineering ships. GB 4964-1985 Measurement of noise radiated by ships in inland waterways and ports GB4964-1985 standard download decompression password: www.bzxz.net

UDC 584.6:629:12:886
National Standard of the People's Republic of China
GB4964—85
Measurement of noise emitted by vessels on inland waterways and harboursPublished on February 28, 1985
National Bureau of Standards
Implementation on October 1, 1985
1 National Standard of the People's Republic of China
Measurement of noise emitted by vessels on inland waterways and harbours bhrrhairs:##4.6-25
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GB425485bzxZ.net
1This standard is used with the condensation, and the amount is larger. It can be used at home. 1,2 technical standards are suitable for testing the resistance and the secret. The applicable point is 0. The energy can be awakened and the energy can be withdrawn. 1.3 This standard can be 1S0 29225. The relevant Hong Kong has been on the radiation break. The high-energy standard-energy name of the technical quantity list is the name of the average liquid KGB 3947-865 people GB372r a
2 test leech
2.! High-frequency absorption test: verify the non-US period - the most standard is the trap test 22 device test! The light test exceeds the service and the quality is achieved. The consultation book is in compliance with the regulations. The type of music supervision test is allowed to be designed and delivered to the acceptance: the difference between the military and the polyester products is allowed. The company should test and report the production time. 3 The quality of the fox industry
3.1 There is a risk of technical test of the film text ALF (A: public, 3.22 called pulse society, the tide quantity adopts "A: false:, 3 in the acceptance test, please do it, thank you for the excitement 13 through the film situation line (, 4 measurement equipment
4.1 net level design is in accordance with G3785·8 section of the certificate, the parts can and the law can be used 22 I use, the can be adjusted is the quality is confirmed. Only the specification. 2 Lake product pulse A noise, the daily specification GR379583 related pulse user special field is determined as the product 1: 1 out of the bay leather device,
4.3 when measuring frequency pressure, the filter braid used is in accordance with 824-8 2 "and micro-group single 2 changes, 3 wave ink beautiful determination.
4.4 comfortable full of the purchase, the network limit or its royal ketone I device, should be accurate frequency measurement production, China production of the original material road high into: standard, the first two standard devices, should not be less than::. Combined energy efficiency. 45 fat win instrument and building standard. Wide trend 1: 188-78 "out of the monitoring program) and 31-7 (use level standard instrument effectiveness program" main age method
national standard fan 198532-28 release
108510·01 implementation
5 test disk environmental conditions
G 4964—85
5.1 The test site should have a self-contained sound field. When there are no large reflective objects within 10 μm around the microphone, such as monuments, small rocks, bridges, buildings, etc., it can be considered that the sound field is fully self-contained. There should be no obstacles around the microphone, that is, there should be no obstacles between the microphone and the noise source, such as water, or no general covering objects (such as grass). 5.2 During measurement, the wind speed should be less than 5 m/s (equivalent to level 3 wind), and the maximum speed should not exceed 10 m/s (equivalent to level 5 wind). The measurement will not be correct at any time. 5.3 During the acceptance test, the sound of the scene (according to waves, other goods, etc.) should be measured. , the noise of the worker and the influence of the wind) should be at least lower than the measured radiation.
5.4 For the whole test, the background noise density is 3 lower than the noise before the ship passes, and it shall be verified according to Table 1. According to 1
the measured liver is normal and the level is the same as B
6 Ship route and distance measurement
radiation reduction before measurement
6.1 Test acid water number: product navigation.
6, 2 test except use, sweet model can maintain, and compatible with the instrument of the 8th school. 6.3 Inland lake measurement: accuracy, super tide or tide
6.4 Special small service: use the main night instrument or the new product of the network, or in the t+ that has been equipped with the distance density receiving mark. 2 m
? The operating conditions of the lead ship during the measurement…
. The non-specialized market information of the ship
was obtained, and the source of the design was good. The package can measure the engine when you are in a stable state. 2 heart test source
7.1.34 modified test secret, the main engine sand was purchased and the transfer was connected, the above transfer, the auxiliary engine under the fee state opened me into a closed 1.4 knowledge set more adjustable pitch in the rotary entertainment award, Zhou Sheng in the full current source concept to verify the transfer 7.1.5 test technology test avoidance, the engine heat micro-response car off point is usually open and excited to forget the measurement. In the monitoring test, the ship is strictly in the ship, ", acid pass driving! 7.2 Moored ships
GB4964-85
For moored vessels or special equipment (such as berthing equipment, etc.), the test should be carried out at the position 25m away from the ship. The auxiliary engine room should also report the normal state. B. Microphone position
8.1 The microphone should be placed at the top of the head, at the height of 1.2~1.5m, preferably 3m and 6m above the water level, and the transmitter should be aligned with the ship's heading. 2. When the measured object passes directly in front of the transmitter, the ship's alignment of the transmitter should be kept at 25m. When it is adjusted away from this distance, its reading should be corrected according to Table 2 of Article 9.5: During the acceptance test, the distance should be between 35m and 20m. 9.1 The readings should be nearly integers, with the readings being the closest to the actual number. 9.2 For any test, the test should be repeated twice. If the results of the two tests do not differ significantly, the test should be repeated, taking the average of the results to the nearest integer. 9.3 For any test, the test may be repeated at intervals.
9.4 If the axis of the test is not symmetrical, the test should be repeated in the patient with the closest test result. 9.5 If the collection does not continue to guarantee the benchmark distance of 2, the corresponding A level, the control 2 add goods to calculate the F distance 26m A level:
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small, # a relatively still can be used under the level of m, thanks to the reading time device can be the side of the distance, m
, -- distance a can be the level,:
A-a non-distance data calculated to the standard! Distance 2A has no correction, the nearest integer brush distance corresponding to the value
6 now obvious impact risk or pure capital when measuring the original technical degree: 25
9.? If you want to make sure the most advanced non-gas operation, you can refer to GB4595---41 "American sound measurement record" related regulations. Tide most record
Comparison request should be replaced with the following relevant content, the excitation group report recorder body fat removal Xie most A. Tide condensation
Test location and non-spraying parts, flow, water depth, super hospital, formation, weather and other equipment back to understand the safety and technical data, follow the speed of this test status to check;.
On the machine, on the machine to use the plate outside the membrane Guangchun standard production cost data and natural tide production technology data of various models, types, according to the most secure products F+et++ T*++
On the ship radiation equipment measurement report
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Economic Adjustment Equipment
GB 4964-85
Appendix A
Quantity report record form
(Cai Wuxin)
Main anti-quality station technical data
m, deep
Main auxiliary machinery and operating machinery (+ machinery with important noise source) teaching
According to the 2n
Fuzzy transfer
Each (child constant longitude · member)
Salt measurement male surface
Xia Zang hair state
Biological Science and Technology Expert Di
Li Key only name hospital::
Writing situation
Measurement unit
GR 4964—85
Relevant data during the test
Draft
Curve level meter
Method
m, water depth under the ship
Opening and closing state of engine room doors and windows
Range method
Calibration period
Calibration version
Witness unit price
Witness
Transducer distance from water
South point n
A,2 Ship radiated slow sound A sound level measurement record
Transmitter side illumination drop distance
GB4964—B5
Additional points
Laser noise A after-stage dB
A,3 Radiated noise spectrum measurement record
A,4.4.1 Is the distance measurement method optical or using a day mark to measure the distance? A.4.2 Is the sound level meter and microphone supported by a tripod or by a hand, whether an extension cable is used, etc. A.4.3.1.4.4.5.1.4.4.6 ... 3150
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Additional Notes:
GB 4964—85
This standard was reviewed and approved by the National Technical Committee for Acoustics Standardization. Chairman of the National Technical Committee for Acoustics Standardization: Dayou, Vice Chairman: Wu Dasheng, Xu Weiyi, Cheng Ruiquan: This standard was proposed by the Noise Subcommittee.
Chairman of the Noise Subcommittee: Cheng Ruiqi, Vice Chairman: Ding Chao, Li Bingguang. This standard was compiled by the Standard Metrology Institute of the Ministry of Communications, the Standard Office of the Seventh Research Institute of China State Shipbuilding Corporation, the Shanghai Ship and Transportation Research Institute of the Ministry of Communications, and the Wuhan Institute of Water Transport Engineering. This standard was drafted by the Standard Compilation Group, with Group Leader: Qian Anxi, and Deputy Group Leaders: Shi Cungen, Zhou Xuxu, and Zhang Baoyu. Group Members: Hong Wushi, Weng Changjian, Wu Tianjian, Cui Weiguo, Yang Yongjian, and Luo Jianghui. 8
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