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JJF 1143-2006

JJF 1143-2006_English: PDF (JJF1143-2006)
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JJF 1143-2006English459 Add to Cart 4 days Calibration specification for acoustic performance of reverberation rooms JJF 1143-2006 Valid JJF 1143-2006

BASIC DATA
Standard ID JJF 1143-2006 (JJF1143-2006)
Description (Translated English) Calibration specification for acoustic performance of reverberation rooms
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Classification of International Standard 17.140
Word Count Estimation 19,133
Date of Issue 2006-05-23
Date of Implementation 2006-08-23
Quoted Standard JJF 1001-1998; JJF 1059-1999; JJG 188-2002; JJG 607-2003; GB/T 3102.7-1993; GB/T 3947-1996; GB/T 4129-2003; GB/T 6881.1-2002; GBJ 47 -1983
Drafting Organization Hubei Provincial Institute of Measurement and Testing
Administrative Organization National Technical Committee on Acoustic Measurement
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to the determination of the reverberation chamber acoustic characteristics and evaluation.

JJF 1143-2006
Calibration specification for acoustic performance of reverberation rooms
National Metrology Technical Specification of the People's Republic
Reverberation chamber acoustic characteristics calibration specification
Released on.2006-05-23
Implementation of.2006-08-23
The General Administration of Quality Supervision, Inspection and Quarantine issued
Reverberation chamber acoustic characteristics calibration specification
This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on May 23,.2006, and
Implemented on August 23,.2006.
Focal Point. National Acoustic Metrology Technical Committee
Main drafting unit. Hubei Institute of Metrology and Testing Technology
Participated in drafting unit. Guangdong Institute of Metrology
This specification is interpreted by the National Acoustic Metrology Technical Committee.
The main drafters of this specification.
Yao Qiuping (Hubei Institute of Metrology and Testing Technology)
Participate in the drafters.
Shi Gengen (Hubei Institute of Metrology and Testing Technology)
Xu Ying (Hubei Institute of Metrology and Testing Technology)
Sun Tao (Hubei Institute of Metrology and Testing Technology)
Luo Yaqing (Hubei Institute of Metrology and Testing Technology)
Li Minyi (Guangdong Institute of Metrology)
table of Contents
1 range (1)
2 Citations (1)
3 terms and units of measurement (1)
4 Overview (1)
5 Measurement characteristics (1)
5.1 Reverberation time of reverberation room (1)
5.2 Reverberation room noise floor (2)
5.3 Uniformity of sound pressure in reverberation chamber (2)
6 Calibration conditions (2)
6.1 Environmental conditions (2)
6.2 Standard and other equipment (2)
7 Calibration items and calibration methods (3)
7.1 Calibration Project (3)
7.2 Calibration method (3)
8 Expression of calibration results (5)
8.1 Calibration Certificate (5)
8.2 Evaluation of Uncertainty of Calibration Results (6)
9 re-study interval (6)
Appendix A Reverberation Room Evaluation Method for Discrete Frequency Component Measurement (7)
Appendix B Calibration Certificate Contents (11)
Appendix C Uncertainty Analysis of Reverberation Time Measurement Results (13)
Reverberation chamber acoustic characteristics calibration specification
1 Scope
This specification applies to the determination and evaluation of the acoustic characteristics of reverberation chambers.
2 Citations
This specification refers to the following documents
JJF 1001-1998 General Terms and Definitions
JJF 1059-1999 "Measurement Uncertainty Evaluation and Representation"
JJG188-2002 "Sound Level Meter"
JJG607-2003 "Audio Signal Generator"
GB/T 3102.7-1993 "Amount and unit of acoustics"
GB/T 3947-1996 "Acoustic terminology"
GB/T 4129-2003 "Acoustic performance and calibration requirements for standard sound sources for sound power level determination"
GB/T 6881.1-2002 "Acoustic sound pressure method for the determination of noise source sound power level reverberation chamber precision method"
GB J47-1983 "Standard for measurement of sound absorption coefficient of reverberation chamber method"
Use of this specification should be done with the current valid version of the above cited documents.
3 terms and units of measure
This specification uses the relevant terms and definitions in JJF 1001-1998 and the provisions of GB/T 3102.7-1993.
The amount and unit.
4 Overview
The reverberation room is a room with a long reverberation time and a sound field that spreads as much as possible. Reverberation chamber is often used for noise sound power precision measurement
Determination, material sound absorption test, diffusion sound field characteristics measurement of electro-acoustic devices. The main acoustic characteristics of the reverberation room are reverberation
The uniformity of sound pressure, the noise floor, and the degree of dispersion of the frequency response. If measured according to this calibration specification, if reverberation
The chamber is equipped with a rotating or vibrating diffuser and should be i