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GB/T 25102.2-2010 English PDF

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US$459.00 · In stock
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GB/T 25102.2-2010: Electroacoustics -- Hearing aids -- Part 2: Hearing aids with automatic gain control circuits
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25102.2-2010	459	Add to Cart	4 days	Electroacoustics -- Hearing aids -- Part 2: Hearing aids with automatic gain control circuits	Valid

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Basic data

Standard ID: GB/T 25102.2-2010 (GB/T25102.2-2010)
Description (Translated English): Electroacoustics -- Hearing aids -- Part 2: Hearing aids with automatic gain control circuits
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M72
Classification of International Standard: 17.140.50
Word Count Estimation: 20,266
Date of Issue: 2010-09-02
Date of Implementation: 2011-04-01
Older Standard (superseded by this standard): GB/T 6659-1986
Quoted Standard: GB/T 3241-1998; GB/T 3769-1983; GB/T 25102.100-2010; GB/T 25102.1-2010; IEC 60118-6-1999; IEC 60268-8-1973; IEC 60711-1981
Adopted Standard: IEC 60118-2-1983, MOD
Regulation (derived from): Announcement of Newly Approved National Standards No. 4 of 2010 (total 159)
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
Summary: This standard provides hearing aids with automatic gain control of the dynamic operating characteristics and steady-state operating characteristics and methods of measurement, This section only provides a variety of different characteristics and associated measurement methods, without requiring the performance indicators, This section applies with automatic gain various types of hearing aids control circuit, this section includes the envelope of the input signal, a compression limiter function of the apparatus or, further comprising a long term average output control device, a) automatic gain control circuit compress or reduce the output sound pressure dynamic range, to keep the output signal integrity, b) an automatic gain control circuit is usually used instead of clipping clipping device, when the input signal is large, the input/output characteristics will tend straight main limiter means the hearing aid is to prevent excessive output sound into the ear the listener, this part does not include: a) expander, b) limiting means, limiter means is different from the automatic gain control circuit, the limiter means slashing above automatic gain control circuit, in the steady state can be maintained constant input signal waveform,

GB/T 25102.2-2010: Electroacoustics -- Hearing aids -- Part 2: Hearing aids with automatic gain control circuits

---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 2. Hearing aids with automatic gain control circuits ICS 17.140.50 M72 National Standards of People's Republic of China Replace GB/T 6659-1986 Electroacoustic hearing aids Part 2. with automatic gain control circuit Of hearing aids Part 2. Hearingaidswithautomaticgaincontrolcircuits (IEC 60118-2. 1983, Hearingaids- Part 2. Hearingaidswithautomaticgaincontrolcircuits, MOD) 2010-09-02 release.2011-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released Directory Preface III Introduction Ⅴ 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 steady state input/output curve 4.1 Enter the relationship between the sound pressure level and the output sound pressure level 4.2 Measurement method 3 5 dynamic output characteristics 4 5.1 Characteristic test 4 5.2 Measurement method 4 6 Nonlinear distortion 4 6.1 Transient 4 6.2 Harmonic distortion 4 6.3 Intermodulation distortion 4

7 Effect of battery or supply voltage variation on steady state and dynamic characteristics

8 Single-channel AGC circuit with pure tone signal Hearing aid AGC Trigger frequency response 5 8.1 Overview 5 8.2 General conditions 5 8.3 Test equipment 5 8.4 Test conditions 5 8.5 Measurements 5 8.6 Frequency Response Record Figure 6 9 with wideband steady state input signal with AGC circuit hearing aid frequency response 6 9.1 General 6 9.2 Test environment 7 9.3 Test conditions 7 9.4 Test equipment 8 9.5 Measurement of frequency response 8 9.6 Frequency Response Record Figure 9 Appendix A (informative) Measurement system Figure 11 Appendix B (informative) Smooth data display 13 Reference 14

Foreword

GB/T 25102 "electroacoustic hearing aids" is divided into 14 parts. - Part 0. Measurement of electroacoustic characteristics; - Part 1. Hearing aids with induction pickup coils; - Part 2. Hearing aids with automatic gain control circuit; - Part 3. Hearing equipment that is not completely worn on the listener; - Part 4. Magnetic field strength of inductive loop systems for hearing aids; - Part 5. Papillary joints of pluggable headphones; - Part 6. Characteristics of hearing aid input circuits; - Part 7. Measurement of the characteristics of the quality inspection of the hearing aid product; - Part 8. Measurement of hearing aid characteristics under simulated operating conditions; - Part 9. Measuring methods for hearing aids with output of bone shock absorbers; - Part 11. Symbols and marks for hearing aids and their associated equipment; - Part 12. Dimensions of electrical connector systems; - Part 13. Electromagnetic compatibility (EMC); Part 14. Specification for digital interfaces. This part is part 2 of GB/T 25102. This part is modified using IEC 60118-2. 1983 "Hearing aids Part 2. Hearing aids with automatic gain control circuits" (English Edition) and IEC 60118-2. 1983 Amendment 1..1993 and IEC 60118-2. 1983 Amendment 2..1997. As in accordance with GB/T 1.1- 2000 to add the normative reference document chapter, the IEC 60118-2. 1983 chapter 2 purpose and the contents of Chapter 3 conditions moved to the introduction, So the chapter, the article number has changed in turn, the increase in the normative reference document for the second chapter, the original IEC 60118-2. 1983, 4,5,6,7,8 chapters For the third edition of this edition of Chapter 3, 4, 5, 6 and 7, and IEC 60118-2. 1983 Amendment 1..1993, Chapter 9, Chapter 8 of this edition, IEC 60118-2. 1983 Revision 2..1997 Added Chapter 10 for Chapter 9 of this release, and on the corresponding page with vertical double "||" lines Marked. This part replaces GB/T 6659-1986 "Measurement method for electroacoustic characteristics of hearing aids with automatic gain control circuits". Compared with GB/T 6659 - 1986, the main changes are as follows. In addition to editorial changes to the original, Plus a lot of new technical content. The main changes are as follows. --- This part has been edited in accordance with GB/T 1.1-2000; - in accordance with the provisions of GB/T 1.1-2000 to increase the "normative reference document" chapter, 1986 version of the purpose of Chapter 2 and the Chapter 3 of the contents of the contents of the move to the introduction, so the chapter, the article number followed by changes, increase the normative reference documents for Chapter 2, the original Chapter 4, 5, 6, 7 and 8 of the 1986 edition are chapters 3, 4, 5, 6 and 7 of this edition; --- modified the original version of the 1986 version of the first chapter of the sixth chapter, the original 7.1 to 6.2, increase 6.1 transient and 6.3 intermodulation distortion; --- Added chapters 8 and 9; --- the original Chapter 4 to Chapter 3, an increase of 3.8,3.9,3.10,3.12,3.13,3.14,3.15 and other seven; - Added Appendix A, Appendix B and references. Appendix A and Appendix B of this section are informative. This part is made by the Ministry of Industry and Information Technology of the People's Republic of China. This part is owned by the National Electrotechnical Standardization Technical Committee (SAC/TC23). This part is responsible for the drafting unit. Tianjin hearing aid factory, the PLA General Hospital. This part of the main drafters. Tang Huide, Yu Liming, Ji Fei, Chen Hongwen, Mo Qingrong. This part of the previous version of the standard to replace the release of the situation. --- GB/T 6659-1986.

Introduction

The purpose of this section is to simplify the measurement of certain characteristics of hearing aids with automatic gain control circuits. These measurements are made GB/T 25102.100-2010 "Electroacoustic hearing aids Part 0. Measurement of electro-acoustic properties" is not described, these measurement methods The role of automatic gain control is necessary. This part of the measurement method can most directly reflect its characteristics, which does not rule out the use of other methods can be the same results. Refer to IEC 60268-8 "Sound System Equipment Part 8. Automatic Gain Control Unit". In addition to the measurements described here, can be carried out according to GB/T 25102.100-2010. However, there is an automatic gain control device , The need to explain the working conditions. Electroacoustic hearing aids Part 2. with automatic gain control circuit Of hearing aids

1 Scope

1.1 This section specifies the dynamic operating characteristics and steady-state operating characteristics of the hearing aid with automatic gain control and its measurement method. This section only provides a variety of different characteristics and related measurement methods, no provisions of the performance indicators. This section applies to various types of hearing aids with automatic gain control circuitry. 1.2 This part includes a device that has a compression or limiting function for the envelope of the input signal and also includes a long-term average output control Device. a) The automatic gain control circuit is used to compress or reduce the dynamic range of the output sound pressure to maintain the integrity of the output signal. b) The automatic gain control circuit is usually used instead of the clipping device for clipping. When the input signal is large, the input/output characteristics tend to be straight. The main effect of the limiting device is to prevent the hearing aid from being output Big voice into the ear of the listener. 1.3 This part does not include. a) expander. b) Limiting device. The limiting device is different from the automatic gain control circuit, and the slicing device cuts the signal peak above a certain level. and Automatic gain control circuit, in the steady state to keep the input signal waveform unchanged. Note. Automatic gain control circuit with very short recovery time may cause distortions that can not be ignored, especially in the low frequency range. attention.

2 normative reference documents

The terms of the following documents are the terms of this part by reference to this part of GB/T 25102. Any reference to the date of the text , All subsequent amendments (excluding corrigenda) or revisions do not apply to this part, however, encouragement under this section The parties to the agreement study whether the latest version of these documents can be used. For undated references, the latest edition of this document applies section. Boeing and fractional octave filters (IEC 61260..1995 Amd.1..2001, IDT) GB/T 3241-1998 GB/T 3769-1983 Electroacoustics Drawing frequency characteristics and scale and dimensions of polar plots (IEC 60263. 1982, MOD) GB/T 25102.100-2010 Electroacoustic hearing aids - Part 0. Measurement of electroacoustic characteristics (IEC 60118-0. 1983, IDT) GB/T 25102.1-2010 Electroacoustic hearing aids - Part 1. Hearing aids with induction pickup coils (IEC 60118-1..1999, IDT) Electroacoustic hearing aids - Part 6. Characteristics of hearing aid input circuits IEC 60118-6..1999 Sound system equipment - Part 8. Automatic gain control device (IEC 60268-8. 1973); Measuring plug - in ear simulator for plug - in headphones

3 terms and definitions

The following terms and definitions apply to this section. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 25102.2-2010_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25102.2-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 25102.2-2010_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25102.2-2010_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.