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JJF 1853-2020: Calibration Specification for Sound Intensity Calibrators
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JJF 1853-2020English579 Add to Cart 5 days [Need to translate] Calibration Specification for Sound Intensity Calibrators

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Basic data

Standard ID JJF 1853-2020 (JJF1853-2020)
Description (Translated English) Calibration Specification for Sound Intensity Calibrators
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 25,241
Date of Issue 2020-07-02
Date of Implementation 2021-01-02
Regulation (derived from) Announcement No. 29 (2020) of the State Administration for Market Regulation
Issuing agency(ies) State Administration for Market Regulation

JJF 1853-2020: Calibration Specification for Sound Intensity Calibrators


---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 Intensity Calibrator) National Metrology Technical Specifications of the People's Republic of China Calibration Specification for Sound Intensity Calibrator 2020-07-02 released 2021-01-02 implementation Issued by the State Administration for Market Regulation Sound intensity calibrator calibration specification Focal point. National Technical Committee of Acoustics Measurement Drafting unit. Beijing Institute of Aerospace Metrology and Testing Technology China Institute of Metrology Hunan Sound Instrument Measurement and Control Technology Co., Ltd. Beijing Great Wall Metrology and Testing Technology Institute Shanghai Hengxin Information Technology Co., Ltd. This specification entrusts the National Acoustics Metrology Technical Committee to be responsible for interpretation Drafters of this specification. Yan Lei (Beijing Institute of Aerospace Metrology and Testing Technology) Daytime (Beijing Institute of Aerospace Metrology and Testing Technology) Niu Feng (China Institute of Metrology) Liu Xiangheng (Hunan Sound Instrument Measurement and Control Technology Co., Ltd.) Yang Xiaowei (Beijing Institute of Aerospace Metrology and Testing Technology) Zhang Bingyi (Beijing Great Wall Metrology and Testing Technology Research Institute) Wang Huan (Shanghai Hengxin Information Technology Co., Ltd.)

table of Contents

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Terms and definitions (1) 3.2 Quantity and unit (2) 4 Overview (2) 5 Metering characteristics (3) 5.1 Sound pressure level (3) 5.2 Sound intensity level (3) 5.3 Frequency(3) 5.4 Total harmonic distortion (3) 5.5 Amplitude and phase consistency of residual sound intensity measuring device (3) 6 Calibration conditions (3) 6.1 Environmental conditions (3) 6.2 Measuring standards and other equipment (3) 7 Calibration items and calibration methods (4) 7.1 Calibration items (4) 7.2 Calibration method (4) 8 Calibration result expression (8) 8.1 Calibration record (8) 8.2 Calibration data processing (8) 8.3 Calibration certificate (8) 8.4 Measurement uncertainty of calibration results (9) 9 Re-calibration interval (9) Appendix A. Content and Format of Calibration Record (10) Appendix B. Content and format of calibration certificate (12) Appendix C Evaluation Example of Measurement Uncertainty (15)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001-2011 "General Metrology Terms and Definition" and JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" together constitute the support for the formulation of this specification The basic series of specifications. This specification refers to GB/T 17561-1998 "Sound pressure for sound intensity measuring instruments Microphone pair measurement", JJG176-2005 "Sound Calibrator", JJG992-2004 "Sound Intensity Measuring Instrument" Measurement methods. This specification is released for the first time. Calibration Specification for Sound Intensity Calibrator

1 Scope

This specification applies to the calibration of sound intensity calibrators used to calibrate pp probe sound intensity measuring instruments.

2 Reference documents

This specification refers to the following documents. JJG176-2005 Sound Calibrator JJG607-2003 Audio signal generator JJG992-2004 Sound intensity measuring instrument JJF 1001-2011 General measurement terms and definitions JJF 1034 Acoustic measurement terms and definitions JJF 1059.1-2012 Evaluation and expression of measurement uncertainty GB/T 2900.86-2009 Electrotechnical terms acoustics and electroacoustics GB/T 3102.7-1993 Acoustic quantities and units GB/T 3947-1996 Acoustic terms GB/T 17561-1998 Sound pressure microphone pair measurement for sound intensity measuring instrument GB/T 20441.4-2006 Measurement microphone work standard microphone specification 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

3.1 Terms and definitions The following terms and definitions defined by JJF 1001-2011, JJF 1034 and GB/T 3947-1996 apply to this code. 3.1.1 Sound intensity probe A transducer system in which the output signal can be processed to obtain sound intensity components in a specific direction. [GB/T 17561-1998, definition 3.1] 3.1.2 pp probe A probe consisting of two microphones separated by a known fixed distance. Two microphones measure the sound pressure, and the average value is It is considered to be the sound pressure at the reference point of the probe, and the sound pressure differential can be used to derive the velocity component of the sound particle. [GB/T 17561-1998, definition 3.2] Note. pp probe is also called dual microphone probe. 3.1.3 Phase difference between pp probe channels When the input is the same, the difference in the phase response between each channel of the pp probe, including the microphone preamplifier and cable (If they are part of the probe). ...

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