GB/T 3320.4-1982 Turntable noise test record
Basic Information
Standard ID:
GB/T 3320.4-1982
Standard Name: Turntable noise test record
Chinese Name:
转盘噪声测试唱片
Standard category:National Standard (GB)
state:in force
Date of Release1982-01-02
Date of Implementation:1983-10-01
standard classification number
Standard ICS number:Telecommunications, audio and video technology>>Audio, video and audiovisual engineering>>33.160.30 Audio systems
Standard Classification Number:Communications, Broadcasting>>Broadcasting, Television Equipment>>M70 Broadcasting, Television Equipment Comprehensive
associated standards
Publication information
other information
Release date:1982-12-24
Review date:2004-10-14
Drafting unit:China Record Factory
Focal point unit:National Radio and Television Standardization Technical Committee
Publishing department:National Bureau of Standards
competent authority:State Administration of Radio, Film and Television
Introduction to standards:
This test record is suitable for determining the turntable noise, signal-to-noise ratio and acoustic feedback of mono and stereo playback equipment. GB/T 3320.4-1982 Turntable Noise Test Record GB/T3320.4-1982 Standard Download Decompression Password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
GB/T3320.4—1982
Rumble measurement test record
Issued on December 24, 1982
National Bureau of Standards
Implementation on October 1, 1983
1 Purpose
National Standard of the People's Republic of China
Rumble measurement test record
UDC681.854
：681.842
GB/T3320.4——1982
This test record is suitable for measuring the turntable noise, signal-to-noise ratio and acoustic feedback of mono and stereo playback equipment. 2 Dimensions
2.1 Nominal diameter: 300 mm
2.2 Center hole diameter: 7.24+ mm
3 Recording content
3.1 The recording characteristics of the modulated slot are as follows:
Modulation mode
Left (L)
Right (R)
Left+right (L+R)
Left-right (L-R)wwW.bzxz.Net
3.2 Unmodulated slot characteristics:
Slot Distance: 0.18 ± 0.01 mm
Starting diameter: 266 mm
Ending diameter: 112 mm
(Hz)
Root mean square value**
(cm/s)
Noise of this record turntable (weighted): ≤-60 dB Duration
(s)
Note: The diameter of the measurement area is 180±5 mm, and the frequency response of the test system is 30 to 15000 Hz 2 dB. 4 Application
Refer to the provisions of Sections 4.15 and 4.16 of the national standard GB2354-1980 "Electric Record Disc". 5 Marking
*Tolerance ±3 Hz.
**Tolerance ±1 dB.
Issued by the National Bureau of Standards on December 24, 1982
(mm)
(mm)
Implemented on October 1, 1983
GB/T3320.4—1982
This record core can be made with reference to the following Figures 1 and 2. GB 3320.1-82 Turntable noise test film Test method GR295480 Working unit Production unit Additional remarks: This standard was proposed by the Ministry of Radio and Television. This standard was drafted by China Record Factory. GB/T3320.4-1982
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.