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Calibration Specification for Noise Meters
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Basic data
| Standard ID | JJF 1727-2018 (JJF1727-2018) |
| Description (Translated English) | Calibration Specification for Noise Meters |
| Sector / Industry | Metrology & Measurement Industry Standard |
| Classification of Chinese Standard | A59 |
| Word Count Estimation | 54,514 |
| Date of Issue | 2018-12-25 |
| Date of Implementation | 2019-03-25 |
| Regulation (derived from) | State Administration of Markets, Announcement No.34 of 2018 |
| Issuing agency(ies) | State Administration for Market Regulation |
JJF 1727-2018: Calibration Specification for Noise Meters
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Noise Meters
National Metrology Technical Specification of the People's Republic
Noise meter calibration specification
Published on.2018-12-25
2019-03-25 implementation
State Market Supervisory Administration released
Noise meter calibration specification
Focal Point. National Acoustic Metrology Technical Committee
Drafting unit. Shenzhen Institute of Metrology and Quality Inspection
Institute of Applied Acoustics, Shaanxi Normal University
Hunan Sound Instrument Measurement and Control Technology Co., Ltd.
Hangzhou Aihua Instrument Co., Ltd.
Zhejiang Institute of Metrology
This specification entrusts the National Acoustic Metrology Technical Committee to explain
Drafters of this specification.
Zhang Guoqing (Shenzhen Metrology and Quality Inspection Institute)
Wu Shengju (Institute of Applied Acoustics, Shaanxi Normal University)
Liu Xiangheng (Hunan Sound Instrument Measurement and Control Technology Co., Ltd.)
Zhang Shaodong (Hangzhou Aihua Instrument Co., Ltd.)
Yao Lei (Zhejiang Institute of Metrology)
Zou Shipeng (Shenzhen Metrology and Quality Inspection Institute)
Chen Mingliang (Shenzhen Metrology and Quality Inspection Institute)
table of Contents
Introduction (III)
1 Scope (1)
2 References (1)
3 Terms and units of measurement (1)
4 Overview (1)
5 Measurement characteristics (2)
5.1 Voltage measurement basic range indication error (2)
5.2 Indication error of upper limit of voltage measurement interval measurement (2)
5.3 dB scale indication error with reference to 1V (2)
5.4 dB scale indication error with reference to 1mW (2)
5.5 Frequency response characteristics of voltage measurement (2)
5.6 DIN/AUDIO weighted frequency response (2)
5.7 DIN/NOISE weighted frequency response (3)
5.8 IEC weighted frequency response (4)
5.9 CCIR weighted frequency response (5)
5.10 CCIR/ARM weighted frequency response (6)
5.11 Dynamic response to a single click (7)
5.12 Dynamic response to continuous clicks (7)
5.13 Noise floor (8)
5.14 Output Voltage (8)
5.15 Frequency Characteristics of Output Voltage (8)
5.16 Channel Crosstalk Attenuation (Crosstalk Rejection Ratio) (8)
5.17 Channel separation (isolation) (8)
6 Calibration conditions (8)
6.1 Environmental Conditions (8)
6.2 Measurement standards and other equipment (8)
7 Calibration items and calibration methods (9)
7.1 Calibration Project (9)
7.2 Calibration method (9)
8 Calibration result expression (16)
8.1 Calibration Record (16)
8.2 Calibration Value Processing (16)
8.3 Calibration Certificate (17)
8.4 Measurement uncertainty of calibration results (17)
8.5 Compliance determination of calibration results (17)
9 re-study interval (17)
Appendix A Contents and Format of Calibration Record (18)
Appendix B Contents and Format of Calibration Certificate (29)
Appendix C Example of Measurement Uncertainty Evaluation (40)
Appendix D ITU-RBS.468-4. 1986 Appendix 2 to the Measurement of Audio Noise Voltage Levels in Acoustic Playback Systems (44)
Appendix E Appendix to the IEC 179 Precision Sound Level Meter (45)
Introduction
This specification is based on the requirements and format of JJF 1071-2010 "National Metrology Calibration Specification Writing Rules", and
The measurement uncertainty is evaluated and expressed in accordance with the requirements of JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation".
The technical requirements for the specified calibration values and error limits of the main calibration items and parameters of this specification are mainly based on the following international
Standard and foreign standards. German standard DIN45405.1967 "Noise level measurement in sound systems" (Noiselevel
Measurementinsoundsystems), International Radio Advisory Committee Standard CCIR468 "Broadcast, Recording
Measurement of audible noise in systems and sound program circuits" (Measurementofaudio-frequencynoisein
Broadcasting, insound-recordingsystemsandonsoundprogrammecircuits), international telecommunications
Union Standard ITU-RBS.468-4.1986 "Measurement of Audio Noise Voltage Levels in Acoustic Playback Systems" (Measurement
Ofaudio-frequencynoisevoltagelevelinsoundbroadcasting) and IEC 61672-1.2013
Acoustic Sound Level Meter Part 1. Specification (Electroacoustics-Soundlevelmeters-Part 1.
Specifications). Audio signal and noise voltage measurement range, indication error, error of the decibel scale of the dial
The technical requirements for items such as difference, noise floor and output voltage refer to the product manual of the main manufacturer of the noise meter.
Specifications and requirements.
This specification is the first release.
Noise meter calibration specification
1 Scope
This specification applies to the calibration of pointer single channel and dual channel noise meters. Other forms of noise meter calibration can refer to
This specification.
2 reference files
This specification refers to the following documents.
JJF 1001-2011 General Measurement Terms and Definitions
JJF 1034-2005 Acoustic measurement terminology and definition
JJF 1167-2007 Noise Meter Calibration Specification
JJF 1200-2008 Audio Power Amplifier Calibration Specifications
GB/T 3102.7 Amount and unit of acoustics
GB/T 3947-1996 acoustic terminology
GB/T 6163-2011 FM radio receiver measurement method
IEC 61672-1.2013 Electroacoustic sound level meters - Part 1. Specification (Electroacoustics-Sound
levelmeters-Part 1.Specifications)
DIN45405.1967 Noise level measurement in sound systems (Noiselevelmeasurementinsound
Systems)
ITU-RBS.468-4.1986 Audio noise voltage level measurement in acoustic broadcasting systems (Measurementof
Audio-frequencynoisevoltagelevelinsoundbroadcasting)
Measurement of audio noise in CCIR468 broadcast, recording system and sound program circuits (Measurement
Ofaudio-frequencynoiseinbroadcasting,insound-recordingsystemsandonsoundpro-
Grammecircuits)
For dated references, only dated versions apply to this specification; undated quotations
The latest version (including all amendments) applies to this specification.
3 terms and units of measure
The terms and definitions defined in JJF 1001, GB/T 3947 and JJF 1034 apply to this specification.
This specification uses the quantities and units specified in GB/T 3102.7.
4 Overview
The noise meter is used to measure audio and audio noise of various recording/broadcasting, audio and other products and equipment in the electroacoustic field.
Acoustic signal measuring instruments, commonly used are single channel and dual channel. The dial has both a voltage scale indication and
1V is the reference and the decibel indication of the relative voltage and power voltage scales referenced to 1mW. Built-in WIDE
BAND broadband and DIN/AUDIO, DIN/NOISE, IEC , CCIR, CCIR/ARM five kinds of frequency weighting
...
