Path: Home > JJ > Page8 > JJF 1730-2018

Price & Delivery

US$509.00 · In stock · Download in 9 seconds
JJF 1730-2018: Calibration Specification for Electro-acoustical Characteristics of Air-conduction Hearing Aids
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid

Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
JJF 1730-2018	English	509	Add to Cart	4 days [Need to translate]	Calibration Specification for Electro-acoustical Characteristics of Air-conduction Hearing Aids

JJF 1730-2018: Calibration Specification for Electro-acoustical Characteristics of Air-conduction Hearing Aids

---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.
(Air emission hearing aid electroacoustic parameter calibration specification) National Metrology Technical Specification Air conduction hearing aid electroacoustic parameter calibration specification Published on.2018-12-25 2019-03-25 implementation State Market Supervisory Administration released Air conduction hearing aid electroacoustic parameter calibration specification Focal Point. National Acoustic Metrology Technical Committee Main drafting unit. China Institute of Metrology Participated in the drafting unit. Hubei Institute of Metrology and Testing Technology Shanghai Institute of Metrology and Testing Technology Chinese People's Liberation Army Medical Acoustics Metrology Test Research Station This specification entrusts the National Acoustic Metrology Technical Committee to explain The main drafters of this specification. Zhong Bo (China Institute of Metrology) Participate in the drafters. Yao Qiuping (Hubei Institute of Metrology and Testing Technology) Deng Wei (Shanghai Institute of Metrology and Testing Technology) Qi Fei (People's Liberation Army Medical Acoustics Measurement and Research Station) Xu Huan (China Institute of Metrology) Zhao Zhengyi (China Institute of Metrology)

table of Contents

Introduction (III) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 3.1 Alternative method (1) 3.2 Comparison method (1) 3.3 (for hearing aids) reference direction (2) 3.4 (Hearing aid) reference point (2) 3.5 Test Points (2) 3.6 Sound gain (2) 3.7 Full sound gain (frequency response curve) (2) 3.8 Saturated sound pressure level (frequency response curve) (2) 3.9 Maximum saturated sound pressure level (2) 3.10 Output sound pressure level when the sound pressure level is 90dB at the specified frequency point (2) 3.11 Reference test frequency (2) 3.12 Reference Test Gain Control Position (2) 3.13 Reference Test Gain (3) 3.14 Frequency Response (3) 3.15 Integrated Frequency Response Curve (3) 3.16 Basic Frequency Response Curve (3) 3.17 high frequency average (3) 3.18 Frequency Response Range (3) 4 Overview (3) 5 Measurement characteristics (3) 5.1 Maximum saturated sound pressure level (3) 5.2 Output sound pressure level when input sound pressure level is 90dB (OSPL90) (3) 5.3 full sound gain (3) 5.4 Frequency response range (4) 5.5 Total Harmonic Distortion (4) 5.6 inherent noise (4) 6 Calibration conditions (4) 6.1 Environmental conditions (4) 6.2 Measurement standards and other equipment (4) 7 Calibration items and calibration methods (5) 7.1 Calibration Project (5) 7.2 Calibration method (5) 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-study interval (9) Appendix A Inner Page Format of Hearing Aid Calibration Certificate (10) Appendix B Example of Uncertainty Evaluation (13)

Introduction

This specification is based on JJF 1071-2010 "Rules for the Preparation of National Metrology Calibration Specifications" and JJF 1059.1-2012 Compilation of Measurement Uncertainty and Representation. This specification mainly refers to GB/T 25102.100-2010 "Electrical Acoustic Hearing Aids Part 0. Electroacoustic Characteristics Measurements and GB/T 25102.7-2017 Electroacoustic Hearing Aids Part 7. Hearing aid production, supply and Measurement of the performance characteristics of quality assurance at the time of delivery. This specification is the first release. Air conduction hearing aid electroacoustic parameter calibration specification

1 Scope

This specification applies to the calibration of electroacoustic parameters of air conduction hearing aids (hereinafter referred to as hearing aids).

2 reference files

This specification refers to the following documents. JJG388-2012 audiometry audio-visual equipment JJF 1001-2011 General Measurement Terms and Definitions JJF 1034-2005 Acoustic measurement terminology and definition GB/T 3102.7 Amount and unit of acoustics GB/T 3947 acoustic terminology GB/T 14199-2010 General specification for electroacoustic hearing aids GB/T 25102.7-2017 Electroacoustic hearing aids - Part 7. Production, supply and delivery of hearing aids Quality assurance performance characteristics measurement GB/T 25102.100-2010 Electroacoustic hearing aids - Part 0. Measurement of electroacoustic characteristics IEC 60318-4.2010 Electroacoustic head and ear simulators Part 4. Electroacoustic couplings to humans Ear earphone measurement with ear simulator (Electroacoustics-Simulatorsofhumanheadandear- Part 4. Occluded-earsimulatorforthemeasurementofearphonescoupledtotheearby Meansofearinserts) IEC 60318-5.2006 Electroacoustic head and ear simulators - Part 5. Earphones and earphones Measuring 2 cubic centimeters coupler (Electroacoustics-Simulatorsofhumanheadandear-Part 5.2cm3couplerforthemeasurementofhearingaidsandearphonescoupledtotheear Bymeansofearinserts) For dated references, only dated versions apply to this specification; undated quotations The latest version (including all revisions) applies to this specification.

3 terms and units of measure

The quantities and units specified in GB/T 3102.7 apply to this specification. JJF 1001-2011, JJF 1034-2005 and GB/T 3947 define the following terms and definitions for this specification. 3.1 Alternative method substitution method [GB/T 25102.100-2010, 3.2] A method of measuring a hearing aid and a microphone that measures the free field sound pressure alternately at the same point in the sound field. 3.2 Comparison method comparisonmethod [GB/T 25102.100-2010, 3.3] Measurement of the hearing aid and the microphone that measures the free field sound pressure at the two acoustic equivalent points in the sound field method. ...