JJF 1798-2020 English PDF

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JJF 1798-2020: Calibration Specification for Sound Insulation Measuring Rooms
Status: Valid

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Basic data

Standard ID: JJF 1798-2020 (JJF1798-2020)
Description (Translated English): Calibration Specification for Sound Insulation Measuring Rooms
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 25,282
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1798-2020: Calibration Specification for Sound Insulation Measuring Rooms

---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 sound insulation measurement room) National Metrology Technical Specifications of the People's Republic of China Calibration specification for sound insulation measurement room 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Calibration specification for sound insulation measurement room Focal point. National Technical Committee of Acoustics Measurement Drafting unit. Zhejiang Institute of Metrology Jilin Institute of Metrology Shenzhen Institute of Metrology and Quality Inspection Hubei Institute of Metrology and Testing Shanghai Institute of Metrology and Testing Technology China Academy of Building Research Co., Ltd. Shanghai Prestige Acoustics Technology Co., Ltd. This specification entrusts the National Acoustics Metrology Technical Committee to be responsible for interpretation Drafters of this specification. Yao Lei (Zhejiang Institute of Metrology) Fang Facheng (Jilin Institute of Metrology) Zhang Guoqing (Shenzhen Institute of Metrology and Quality Inspection) Yao Qiuping (Hubei Institute of Metrology and Testing) An Zhaoliang (Shanghai Institute of Metrology and Testing Technology) Yan Guojun (China Academy of Building Research Co., Ltd.) Luo Wei (Shanghai Reputation Acoustic Technology Co., Ltd.)

table of Contents

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 The maximum measurable sound insulation (1) 4 Overview (1) 5 Measurement characteristics (2) 5.1 Background noise (2) 5.2 Sound field uniformity (2) 5.3 Reverberation time (2) 5.4 Maximum measurable sound insulation (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (2) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Calibration method (3) 8 Calibration result expression (6) 8.1 Calibration record (6) 8.2 Calibration data processing (6) 8.3 Calibration certificate (6) 8.4 Measurement uncertainty of calibration results (6) 9 Suggested re-check interval (6) Appendix A Contents of Calibration Record (7) Appendix B Contents of Calibration Certificate (11) Appendix C Example of Uncertainty Evaluation of the Maximum Measurable Sound Insulation (15)

Introduction

This specification is compiled in accordance with the rules and format given in JJF 1071-2010 "Rules for the Preparation of National Metrology and Calibration Specifications". This specification refers to JJF 1143-2006 "Calibration Specification for Acoustic Characteristics of Reverberation Room", GB/T 19889.1-2005 "Acoustic Measurement of Sound Insulation of Buildings and Building Elements Part 1.Requirements for Laboratory Test Facilities with Suppressed Lateral Sound Transmission", GB/T 19889.3-2005 "Acoustic measurement of sound insulation of buildings and building components Part 3.Building components Laboratory measurement of air and sound insulation" etc. This specification is released for the first time. Calibration specification for sound insulation measurement room

1 Scope

This specification is applicable to the calibration of sound insulation measurement rooms where lateral sound transmission is suppressed for measuring airborne sound insulation.

2 Reference documents

This specification refers to the following documents. JJG4-2015 Steel tape measure JJG176 Sound Calibrator JJG449-2014 Octave and Fractional Octave Filter JJG607 Audio signal generator JJG1019 working standard microphone (coupling cavity comparison method) JJF 1001-2011 General measurement terms and definitions JJF 1034 Acoustic measurement terms and definitions JJF 1143-2006 Calibration Specification for Acoustic Characteristics of Reverberation Room JJF 1468-2014 Non-directional sound source calibration specification GB/T 3102.5-1993 Quantities and units of electricity and magnetism GB/T 3102.7-1993 Acoustic quantities and units GB/T 6881.1-2002 Acoustic Sound Pressure Method for the Determination of Sound Power Level of Noise Sources Reverberation Room Precision Method GB/T 19889.1-2005 Acoustics Measurement of sound insulation of buildings and building components Part 1.Lateral sound transmission Suppressed laboratory test facility requirements GB/T 19889.3-2005 Acoustics Measurement of sound insulation of buildings and building components Part 3.Building components Laboratory measurement of air and sound insulation GB/T 50121-2005 Building Sound Insulation Evaluation Standard For dated reference documents, only the dated version applies to this specification; for undated reference documents, The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

The following terms and definitions defined by JJF 1001 and JJF 1034 apply to this code. 3.1 Maximum measurable sound insulation The sound insulation measurement value of the wall (or component) between the sound source room and the receiving room when the sound insulation measurement room is in the working condition of maximum sound insulation performance.

4 overview

The side sound transmission suppressed sound insulation measurement room (hereinafter referred to as the "sound insulation measurement room") is often used to measure materials and components Air sound insulation performance generally includes two adjacent reverberation rooms, one is the sound source room and the other is the receiving room ......

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