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JJG 389-2003 English PDF

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Q: Should I purchase the latest version JJG 389-2003?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 389-2003 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$469.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 389-2003: Verification Regulation of Artificial Ears
Status: Valid

JJG 389: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 389-2003	469	Add to Cart	3 days	Verification Regulation of Artificial Ears	Valid
JJG 389-1985	319	Add to Cart	3 days	Verification Regulation of Artificial Ears	Obsolete

Similar standards

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Older Standard (superseded by this standard): JJG 389-1985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)

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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 389-2003_English be delivered?

Answer: Upon your order, we will start to translate JJG 389-2003_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 389-2003_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 389-2003_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 389-2003?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 389-2003 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.