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JJG 389-2003 English PDF

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JJG 389-2003: Verification Regulation of Artificial Ears
Status: Valid

JJG 389: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 389-2003English469 Add to Cart 3 days [Need to translate] Verification Regulation of Artificial Ears Valid JJG 389-2003
JJG 389-1985English319 Add to Cart 3 days [Need to translate] Verification Regulation of Artificial Ears Obsolete JJG 389-1985

PDF similar to JJG 389-2003


Standard similar to JJG 389-2003

GB/T 3222.2   GB/T 3222.1   JJG 188   JJG 921   JJG 778   JJG 388   

Basic data

Standard ID JJG 389-2003 (JJG389-2003)
Description (Translated English) Verification Regulation of Artificial Ears
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 18,115
Date of Issue 2003-09-23
Date of Implementation 2004-03-23
Older Standard (superseded by this standard) JJG 389-1985
Quoted Standard IEC 60318.1-1998; IEC 60318.2-1998; IEC 60318.3-1998; IEC 61094.1-1992; IEC 61094.4-1995; JJF 1059-1999
Regulation (derived from) State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106
Summary This standard applies to the artificial ear of the first test, test and use the subsequent test.

JJG 389-2003: Verification Regulation of Artificial Ears

---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.
Verification Regulation of Artificial Ears People's Republic of China National Metrological Verification Procedures Ear simulation ArtificialEars 2003-09-23 released 2004-03-23 implementation General Administration of Quality Supervision, Inspection and Quarantine released Simulation ear calibration procedures Replacing JJG 389-1985 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 23,.2003, and since March 23,.2004 shall come into force. Administrative Organization. National Acoustic Measurement Technical Committee Main drafting units. China Institute of Metrology The procedures entrust the National Acoustic Measurement Technical Committee responsible for the interpretation The main drafters of this procedure. Shuai Zhengping (China Institute of Metrology) Chen Jianlin (China Institute of Metrology) Participate drafters. Mei-e Zhang (China Institute of Metrology) Qiu Jianhua (China Institute of Metrology) Bai Ying (China Institute of Metrology) Zheng Xiaoyuan (China Institute of Metrology)

table of Contents

1 Scope (1) 2 References (1) 3 Overview (1) 4 measurement performance requirements (1) 4.1 Frequency Range (1) 4.2 Acoustic Coupling Chamber (1) 4.3 Static Pressure Balance (1) 4.4 Microphone (1) 5 General technical requirements (2) 5.1 Materials (2) 5.2 nameplate, marking and instruction manual (2) 6 measuring instruments control (3) 6.1 first test and follow-up test (3) 6.2 In-service inspection (7) Appendix A test certificate and test results notice page format (8) Appendix B Evaluation of Uncertainty in Simulation Ear Measurement (10) Simulation ear calibration procedures The rules based on international standards IEC 60318-1998 "electro-acoustic - human head and human ear simulator."

1 Scope

This procedure applies to the first test of the simulation ear, follow-up test and in-service test.

2 References

This regulation cites the following documents. IEC 60318.1-1998 "Part 1. Earsimulatorforthecalibrationofsupra-aural earphones " IEC 60318.2-1998 "Part 2. Aninterimacoustic coupling tool of calibration of a- diometricearphonesintheextendedhigh-frequencyrange " IEC 60318.3-1998 "Part 3. Acousticcouplerforthecalibrationofsupral-aural earphonesusedinaudiometry " IEC 61094.1-1992 "Part 1. Specifications for laboratory standard microprophones" IEC 61094.4-1995 "Part 4. Specifications for working standard microphones" JJF1059-1999 "Measurement Uncertainty Evaluation and Expression" When using this code, care should be taken to use the currently valid version of the above cited references.

3 Overview

Ear simulation ear, also known as ear simulator, which is calibrated by a, and the provisions of the type of sound pressure measurement microphone and harmony Coupling chambers or acoustic components that simulate the acoustic impedance of the ear canal for objective calibration of the earpiece.

4 measurement performance requirements

4.1 Frequency range Simulation of the ear's frequency range is generally 20Hz ~ 10kHz; for the test ear headphones only for the simulation of the ear, the frequency The range can be between 125Hz ~ 8kHz; for the expansion of the high-frequency range of test detection ear headphones with temporary coupling cavity, The extended frequency range should be 8kHz ~ 16kHz. 4.2 acoustic coupling cavity The structure and effective volume of the acoustic coupling cavity shall comply with the relevant provisions of IEC 60318..1998. 4.3 static pressure balance When plugging or opening a static pressure equalizing hole with a plug, in the frequency range of 100Hz ~ 10kHz, in the ear Sound pressure generated by the machine should not exceed 0.2dB. 4.4 microphone The simulated ear microphone shall comply with the technical requirements of IEC 61094-4..1995 and the tolerance provisions for frequency response are given in Table 1, the microphone sound pressure sensitivity level (including measurement system) should be known within the specified frequency range, the measurement

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