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GB/T 25102.8-2017: Electroacoustics -- Hearing aids -- Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
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Electroacoustics -- Hearing aids -- Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
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GB/T 25102.8-2017
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Basic data | Standard ID | GB/T 25102.8-2017 (GB/T25102.8-2017) | | Description (Translated English) | Electroacoustics -- Hearing aids -- Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | M72 | | Classification of International Standard | 17.140.50 | | Word Count Estimation | 27,233 | | Date of Issue | 2017-11-01 | | Date of Implementation | 2018-05-01 | | Older Standard (superseded by this standard) | GB/T 11453-1989 | | Regulation (derived from) | National Standard Announcement 2017 No. 29 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 25102.8-2017: Electroacoustics -- Hearing aids -- Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
---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.
Electroacoustics-Hearing aids-Part 8. Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
ICS 17.140.50
M72
National Standards of People's Republic of China
Replacing GB/T 11453-1989
Electroacoustic hearing aids
Part 8. Simulate actual working conditions
Hearing aid performance measurement method
Part 8. Methods of measurement of performance characteristics
(IEC 60118-8.2005, IDT)
2017-11-01 Release.2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Preface Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 limit 4
5 test equipment 5
5.1 Test space acoustic requirements 5
5.2 sound source 5
5.3 Human Body Model 5
5.4 Ear simulator 5
5.5 ear plug simulator 5
5.6 plugging ear simulator sound pressure level measurement equipment 5
5.7 automatic sweep recording equipment 6
5.8 free field sound pressure level calibration equipment 6
6 test conditions 6
6.1 Test Point Selection 6
6.2 Atmospheric conditions 6
6.3 Human Body Model 6
6.4 Hearing aid position 7
6.5 hearing aid normal working conditions 7
7 measure 7
7.1 Overview 7
7.2 Reference input sound pressure level adjustment 8
7.3 Human Body Model Frequency Response (MFR) 8
7.4 Measuring the full range analogue insertion gain 8 with a constant reference input sound pressure level method
7.5 Constant Ears Simulator SPL measures full range analog insertion gain 9
7.6 Point to Feature 9
7.7 Simulation of the actual working conditions OSPL90 measurement 11
7.8 SIMULATION SIMULATION SIMPLIFIED METHOD OF SIMULATING GAIN RESPONSE AND INSERTION GAIN RESPONSES TO ACTUAL OPERATIONAL CONDITIONS 11
8 Frequency response record chart 11
9 Maximum allowable extended measurement uncertainty 12
Appendix A (Normative) Free field to hearing aid microphone conversion 13
Appendix B (Normative) Manikin non-blocking ear gain (open ear response) 18
Appendix C (Informative) Human Body Model Common Requirements 21
References 23
Foreword
GB/T 25102 "electroacoustic hearing aids" includes the following sections.
--- Part 0. Measurement of electroacoustic characteristics;
--- Part 1. Hearing aids with inductive pickup coil input;
--- Part 2. Hearing aids with automatic gain control circuit;
--- Part 3. Hearing aid not completely worn on the listener;
--- Part 4. Hearing aids with induction loop system magnetic field strength;
--- Part 5. Plug nipple nipple;
--- Part 6. Hearing aid input circuit characteristics;
--- Part 7. Measurement of performance characteristics of quality assurance in the manufacture, supply and delivery of hearing aids;
--- Part 8. Simulation of actual hearing aid performance measurement methods;
--- Part 9. Hearing aids with bone oscillator output characteristics of measurement methods;
--- Part 11. Symbols and marking of hearing aids and related equipment;
--- Part 12. Size of the electrical connector system;
--- Part 13. Electromagnetic compatibility (EMC);
--- Part 14. Specification of digital interface;
--- Part 15. Method of characterizing hearing aid signal processing using speech-like signals.
This section GB/T 25102 Part 8.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 11453-1989 "Simulation of actual operating conditions hearing aid performance measurement."
This section compared with GB/T 11453-1989, in addition to editorial changes outside the main changes are as follows.
--- Added hearing aid in the simulation of the actual working conditions of a simplified test method (see 7.8);
--- Increased hearing aid microphone directional directivity index (DI) description and methods (see 7.6.4);
--- Given the maximum allowable measurement expansion uncertainty (see Chapter 9).
This section uses the translation method identical with the International Standard IEC 60118-8.2005 "Electroacoustic hearing aids Part 8. Simulation of real workers
Hearing aids for the performance measurement conditions. "
The documents of our country that are consistent with the corresponding international documents that are normative references in this section are as follows.
--- GB/T 3769-2010 Electroacoustic mapping of frequency characteristics and polar scale scale and size (IEC 60263.1982,
IDT);
--- GB/T 25102.100-2010 Electroacoustic hearing aids Part 0. Measurement of electroacoustic properties (IEC 60118-0.1983,
MOD).
This part is proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This part of the National Electroacoustic Standardization Technical Committee (SAC/TC23) centralized.
This part of the drafting unit.Jiangsu Medical Device Inspection Institute, China Electronics Technology Group Corporation Institute of the Third Shanghai Measurement and Testing Technology
Technology Research Institute, Shanghai Food and Drug Administration Certification Review Center, Xitian extension hearing technology (Suzhou) Co., Ltd., Sonovar hearing technology
Surgery (Shanghai) Co., Ltd.
The main drafters of this section. Chen Tao, Zhang Wei, Fan Tingbo, Zhou Wei, Zhu Yingfeng, Shi Ye Dong, Zhang Shijun.
This part replaces the standards previously issued as.
--- GB/T 11453-1989.
Introduction
Measurement methods that take into account the wearer's influence on the acoustic performance of a hearing aid are important, especially when the measurement results aid in the selection of a hearing aid.
In contrast to the standards that focus on type approval and quality control (eg IEC 60118-0 and IEC 60118-7), this section provides information and options
Hearing aids are more relevant.
This part of the measurement method requires the use of some equipment, such as the need for human models to simulate the wearer, which is to establish a reliable simulation of the actual
A hearing aid measurement method is required. In order to simulate the performance measurement of the hearing aid under actual working conditions, it is necessary to establish several fingers
south. This section describes these recommended methods.
Electroacoustic hearing aids
Part 8. Simulate actual working conditions
Hearing aid performance measurement method
1 Scope
This section GB/T 25102 specifies the measurement of the acoustic effects of adult hearing aids on hearing aids.
This section applies to the establishment of simulated hearing aid performance measurement under actual working conditions, proposed a simulation of the actual conditions of hearing aid
A simplified method of measurement and a method of determining the directional index (DI) in the horizontal direction of a directional microphone in a hearing aid.
In addition, this section provides tolerance. Only when the actual results of the test laboratory include extended uncertainties completely fall under this
Part of the provisions of the Umax value of the extension of the tolerance, in order to prove compliance with this section.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Hearing aids - Part 0. Measurement of electroacoustic properties (Hearingaids - Part 0. Measurement of a
electroacousticalcharacteristics)
IEC 60263 to draw frequency characteristics and polar scale scale and size (Scalesandsizesforplottingfrequency
characteristicsandpolardiagrams)
IEC 60711 plugs plugged ear measurement ear simulator (Occluded-earsimulatorforthemeasurementof
earphonescoupledtotheearbyearinserts)
IEC 60959 Air-Conducted Hearing Aid Provisional head and torso simulators for acoustic measurements
simulatorforacousticmeasurementsofairconductionhearingaids)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Sound pressure level soundpressurelevel
The reference pressure for all SPLs in this section is 20μPa.
3.2
Ear wing simulator pinnasimulator
A device that approximates the average adult ear shape and size.
3.3
Ear simulator earsimulator
Device for measuring headphone output sound pressure level at specified frequency range and under specified load conditions. It basically includes the main cavity, the acoustic load network and
Calibrated microphone. The microphone position is chosen so that the sound pressure on the microphone approximately corresponds to that appearing on the human eardrum
Sound pressure.
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