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JJF 1201-2008 English PDF

US$649.00 · In stock
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JJF 1201-2008: Calibration specification for hearing aids measurement instrument
Status: Valid

JJF 1201: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1201-2008	English	649	Add to Cart	5 days [Need to translate]	Calibration specification for hearing aids measurement instrument	Valid	JJF 1201-2008
JJF 1201-1990	English	199	Add to Cart	2 days [Need to translate]	Operating Technical Norm of 3.39μm Wavelength primary Standard	Obsolete	JJF 1201-1990

PDF similar to JJF 1201-2008

Standard similar to JJF 1201-2008

GB/T 3222.2 GB/T 3222.1 JJG 188 JJF 1191 JJF 1202 JJF 1200

Basic data

Standard ID	JJF 1201-2008 (JJF1201-2008)
Description (Translated English)	Calibration specification for hearing aids measurement instrument
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A59
Word Count Estimation	28,242
Date of Issue	2008-04-16
Date of Implementation	2008-07-16
Quoted Standard	GB/T 3102.5-1993; GB/T 3102.7-1993; GB/T 6657-1986; GB/T 6659-1986; JJG 176-2005; JJG 449-2001; JJF 1001-1998; JJF 1034-2005; JJF 1059 -1999; IEC 60118-7-2005
Regulation (derived from)	AQSIQ Announcement No. 45 of 2008
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to the hearing aid tester calibration.

JJF 1201-2008: Calibration specification for hearing aids measurement instrument

---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 hearing aids measurement instrument People's Republic of China National Metrology Technical Specifications Hearing aid tester calibration specification Posted 2008-04-16 2008-07-16 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Hearing aid tester calibration specification This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on April 16, 2008, and from From July 16, 2008 into effect. Focal point. the National Committee of the acoustic measurement technology Drafting unit. Hubei Provincial Institute of Measurement and Testing This specification by the responsible National Technical Committee acoustic measurement interpretation Drafters of this specification. Yao Qiuping (Hubei Institute of Measurement and Testing) When the root of fire (Hubei Institute of Measurement and Testing) Xu Ying (Hubei Institute of Measurement and Testing) Dan Shuguang (Hubei Institute of Measurement and Testing) Song Yifeng (Hubei Institute of Measurement and Testing)

1 Scope (1) 2. Referenced Documents (1) 3 terminology and units of measurement (1) 4 Overview (1) 5 Metrological characteristics (1) The noise floor of the test chamber in 5.1 (1) 5.2 sound source characteristics (1) 5.3 Sound pressure level measurement accuracy (2) 5.4 Test microphone frequency response (2) Total harmonic distortion 5.5 sound pressure level measurement system (2) 5.6 Linear (2) 5.7 RMS Characteristics (2) 5.8 Rise/Recovery Time (2) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 Standard device and other equipment (2) 7 calibration items and calibration methods (3) 7.1 calibration items (3) 7.2 Calibration method (3) 8 calibration results expression (7) 8.1 Calibration Data Processing (7) 8.2 calibration certificate (7) 8.3 calibration measurement uncertainty (7) 9 Recalibration interval (8) Appendix A calibration certificate (9) Examples Appendix B Evaluation of Measurement Uncertainty (12) Hearing aid tester calibration specification

1 Scope

This instruction applies to a hearing aid tester calibration.

2 Citations

This specification references the following documents GB/T 3102.5-1993 "electricity and magnetism Quantities and units" GB/T 3102.7-1993 "acoustic volume and unit" GB/T 6657-1986 "Measurement of electroacoustical characteristics of hearing aids." GB/T 6659-1986 "with a measurement method of electro-acoustic characteristics of hearing aids AGC circuit" JJG176-2005 "sound calibrators test procedures" JJG449-2001 "octave and 1/3 octave filter test procedures" JJF 1001-1998 "common measurement terms and definitions" JJF 1034-2005 "Acoustic measurement terminology and definitions" JJF 1059-1999 "Evaluation and Expression of Uncertainty in Measurement" IEC 60118-7.2005 "electroacoustic aids - Part 7. When the hearing aid product delivery quality inspection Performance measurement "(Electroacoustics-Hearingaids-Part 7. Measurementoftheperformancecharac- teristicsofhearingaidsforproduction, supplyanddeliveryqualityassurancepurposes) When using this specification it should be noted that using the currently valid version of the documents cited.

3 terminology and units of measurement

This specification uses terminology and definitions relating to the JJF 1001-1998 and JJF 1034-2005. This specification uses GB/T 3102.5-1993 Quantities and units and GB/T 3102.7-1993 prescribed.

4 Overview

Hearing aid tester is a device for measuring the electro-acoustic characteristics of hearing aids, which mainly consists of test cases, the sound source, control is transferred Composition microphone, ear simulator, sound pressure measurement systems, attenuator, distortion measurement systems and power supply and other parts. 5 Metrological characteristics ① 5.1 The noise floor of the test chamber The noise floor of the test chamber should be low enough in the frequency range of 200Hz ~ 8kHz-third octave band, Its background noise should be at least lower than the measured hearing inherent noise 10dB. 5.2 sound source characteristics 5.2.1 Alternative method Reference SPL error. in the frequency range of 200Hz ~ 5kHz, ② generally no more than ± 1.0dB, Note. ① metrological characteristics of the specification's technical indicators are not used to determine eligibility, only to provide a reference. ② The specification of Article 5 of the "General" and represents the performance indicators mentioned for reference purposes only.

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