ASA S3 47-2014 American National Standard Specification of Performance Measurement of Hearing Assistance Devices Systems.pdf

1、ANSI/ASAS3.47-2014ANSI/ASA S3.47-2014 AMERICAN NATIONAL STANDARD Specification of Performance Measurement of Hearing Assistance Devices/Systems Accredited Standards Committee S3, Bioacoustics Standards Secretariat Acoustical Society of America 35 Pinelawn Road, Suite 114 E Melville, NY 11747-3177 Th

2、e American National Standards Institute, Inc. (ANSI) is the national coordinator of voluntary standards development and the clearinghouse in the U.S.A. for information on national and international standards. The Acoustical Society of America (ASA) is an organization of scientists and engineers form

3、ed in 1929 to increase and diffuse the knowledge of acoustics and to promote its practical applications. ANSI/ASA S3.47-2014 AMERICAN NATIONAL STANDARD Specification of Performance Measurement of Hearing Assistance Devices/Systems Secretariat: Acoustical Society of America Approved on January 24, 20

4、14, by: American National Standards Institute, Inc. Abstract This standard provides methods for evaluation of hearing assistance devices/systems (HADS) that are packaged for individual use and deliver the signal via air conduction to the user. Among the test methods described are family of response

5、curves, output sound pressure curve for 90-dB sound pressure level input, frequency range, total harmonic distortion, noise level with no input, static and dynamic AGC characteristics, and gain control linearity. The measurements are similar to those described in ANSI/ASA S3.22-2009 American Nationa

6、l Standard Specification of Hearing Aid Characteristics. AMERICAN NATIONAL STANDARDS ON ACOUSTICS The Acoustical Society of America (ASA) provides the Secretariat for Accredited Standards Committees S1 on Acoustics, S2 on Mechanical Vibration and Shock, S3 on Bioacoustics, and S12 on Noise. These co

7、mmittees have wide representation from the technical community (manufacturers, consumers, trade associations, organizations with a general interest, and government representatives). The standards are published by the Acoustical Society of America as American National Standards after approval by thei

8、r respective Standards Committees and the American National Standards Institute (ANSI). These standards are developed and published as a public service to provide standards useful to the public, industry, and consumers, and to Federal, State, and local governments. Each of the accredited Standards C

9、ommittees (operating in accordance with procedures approved by ANSI) is responsible for developing, voting upon, and maintaining or revising its own Standards. The ASA Standards Secretariat administers Committee organization and activity and provides liaison between the Accredited Standards Committe

10、es and ANSI. After the Standards have been produced and adopted by the Accredited Standards Committees, and approved as American National Standards by ANSI, the ASA Standards Secretariat arranges for their publication and distribution. An American National Standard implies a consensus of those subst

11、antially concerned with its scope and provisions. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessar

12、ily unanimity. Consensus requires that all views and objections be considered and that a concerted effort be made towards their resolution. The use of an American National Standard is completely voluntary. Their existence does not in any respect preclude anyone, whether he or she has approved the St

13、andards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the Standards. NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be

14、taken periodically to reaffirm, revise, or withdraw this Standard. Acoustical Society of America ASA Secretariat 35 Pinelawn Road, Suite 114E Melville, New York 11747-3177 Telephone: 1 (631) 390-0215 Fax: 1 (631) 390-0217 E-mail: asastdsaip.org 2014 by Acoustical Society of America. This standard ma

15、y not be reproduced in whole or in part in any form for sale, promotion, or any commercial purpose, or any purpose not falling within the provisions of the U.S. Copyright Act of 1976, without prior written permission of the publisher. For permission, address a request to the Standards Secretariat of

16、 the Acoustical Society of America. i 2014 Acoustical Society of America All rights reserved Contents 1 Scope . 1 2 Normative references. 2 3 Definitions 2 3.1 Terms relating to devices . 2 3.2 Terms relating to classification of HADS by transmission 3 3.3 Terms relating to classification of HADS by

17、 function . 4 3.4 Terms relating to components of HADS that are addressed in this standard 5 3.5 Terms relating to performance parameters of HADS . 7 3.6 Terms relating to test equipment and test conditions. 8 3.7 Terms relating to measurements with acoustic inputs . 8 4 Test equipment 9 4.1 Test sp

18、ace 9 4.2 Sound source . 9 4.3 Test signal 9 4.4 Graphical output . 9 4.5 Output coupling system 9 4.6 Input test environment 10 4.7 RMS response measures . 10 4.8 Averaging time constant for noise measurement . 10 5 Standard conditions . 10 5.1 Ambient conditions . 10 5.2 Operating conditions. 11 5

19、.3 Component and control identification . 11 5.4 Equipment setup. 11 5.5 Basic settings of controls 13 5.6 Curves 14 6 Recommended measurements and specifications 14 6.1 General . 14 6.2 Family of output curves 14 6.3 OSPL90 14 6.4 HFA-OSPL90 14 6.5 OSPL60 14 6.6 HFA-OSPL60 14 6.7 Frequency range 14

20、 6.8 Total harmonic distortion 15 6.9 Noise level with no input. 15 6.10 HADS equivalent input noise (HADS-EIN) . 16 6.11 HADS with AGC . 16 6.12 Gain control linearity. 16 6.13 Current drain. 17 2014 Acoustical Society of America All rights reserved ii Figures Figure 1 Comparison of results for an

21、earbud measured with openings unoccluded (Curve #1) and occluded (Curve #2). 6 Figure 2 Test setup for evaluation of HADS with direct audio input. . 12 Figure 3 Test setup for evaluation of HADS with a neckloop. . 13 iii 2014 Acoustical Society of America All rights reserved Foreword This Foreword i

22、s for information only and is not a part of the American National Standard ANSI/ASA S3.47-2014 American National Standard Specification of Performance Measurement of Hearing Assistance Devices/Systems. As such, this Foreword may contain material that has not been subjected to public review or a cons

23、ensus process. In addition, it does not contain requirements necessary for conformance to the standard. This standard comprises a part of a group of definitions, standards, and specifications for use in bioacoustics. It was developed and approved by Accredited Standards Committee S3, Bioacoustics, u

24、nder its approved operating procedures. Those procedures have been accredited by the American National Standards Institute (ANSI). The Scope of Accredited Standards Committee S3 is as follows: Standards, specifications, methods of measurement and test, and terminology in the fields of psychological

25、and physiological acoustics, including aspects of general acoustics which pertain to biological safety, tolerance and comfort. This standard is not comparable to any existing ISO or IEC Standard. At the time this Standard was submitted to Accredited Standards Committee S3, Bioacoustics, for approval

26、, the membership was as follows: C.J. Struck, Chair VACANT, Vice-Chair S.B. Blaeser, Secretary Acoustical Society of America .C.J. Struck . M.D. Burkhard (Alt.) American Academy of Audiology.C. Schweitzer . T. Ricketts (Alt.) American Academy of Otolaryngology, Head and Neck Surgery, Inc R.A. Dobie

27、L.A. Michael (Alt.) American Industrial Hygiene Association T.K. Madison D. Driscoll (Alt.) American Speech-Hearing-Language Association (ASHA) . L.A. Wilber .N. DiSarno (Alt.) Beltone/GN Resound . S. Petrovic Council for Accreditation in Occupational Hearing Conservation (CAOHC) . L.D. Hager ETS-Li

28、ndgren Acoustic Systems . S. Dunlap . D. Winker Etymotic Research, IncM.C. Killion . J.K. Stewart (Alt.) Food and Drug Administration (FDA) S-C Peng Frye Electronics, Inc. G.J. Frye . K.E. Frye (Alt.) 2014 Acoustical Society of America All rights reserved iv J.R. Bareham K.D. Kryter C.J. Struck A.J.

29、 Brammer R.L. McKinley H. Teder R.F. Burkard P.D. Schomer L.A. Wilber A.J. Campanella W.A. Yost G.R.A.S. Sound FAX: 631-390-0217; E-mail: asastdsaip.org. 2014 Acoustical Society of America All rights reserved vi Introduction This standard describes definitions and measurements suitable for the speci

30、fication and evaluation of Hearing Assistance Devices/Systems (HADS). HADS are a group of instruments with diverse physical configurations that are intended to facilitate hearing by providing amplification of an acoustic signal and/or improving the signal-to-noise ratio by means of a non-acoustic si

31、gnal transmission method. These devices and systems include personal assistive listening devices, hearing assistance technologies, auditory trainers, large-area assistive listening systems, telephone amplifiers, alerting devices, and other similar devices. This document addresses a subset of these d

32、evicesspecifically, those that transmit directly to a person via earphones, hearing aid, or implant. This standard excludes implants. In addition, this standard excludes acoustic hearing aids as HADS because they are covered under ANSI/ASA S3.22 American National Standard for Specification of Hearin

33、g Aid Characteristics. Some devices that contain microphone, amplifier, power supply, and receiver within a case worn behind the ear or in the ear are referred to as personal sound amplifiers (PSAP) because they are not marketed for persons with hearing loss and are not prescriptively fit based on a

34、udiometric results. Although they are not considered medical devices by the FDA, PSAPs are not addressed in this standard because they may be evaluated electroacoustically according to ANSI/ASA S3.22-2009. 2014 Acoustical Society of America All rights reserved 1 AMERICAN NATIONAL STANDARD ANSI/ASA S

35、3.47-2014 American National Standard Specification of Performance Measurement of Hearing Assistance Devices/Systems 1 Scope This standard defines various types of HADS and describes procedures for measuring their performance characteristics. These procedures are useful for comparing the performance

36、characteristics among various HADS. This standard addresses the measurement of the output characteristics of HADS regardless of the method of transmission. Whenever the device/system is capable of transmitting signals using two or more transmission methods, this standard requires that the output of

37、the device/system be measured using each transmission method. For the purpose of providing consistent product descriptions and maintaining consistent expectations for product performance for each model, this standard provides: guidelines for the description of the physical characteristics of HADS; g

38、uidelines for the description of the transmission methods used in HADS; and procedures for measuring electroacoustic characteristics accurately and consistently. The electroacoustic characteristics described within this standard are measured at settings described by the manufacturer. These character

39、istics include: family of response curves (50- to 90-dB SPL input in 10 dB increments) output sound pressure level for 90-dB SPL input high frequency average output sound pressure level for 90-dB SPL (HFA-OSPL90) input high frequency average output sound pressure level for 50-dB SPL (HFA-OSPL50) inp

40、ut frequency range total harmonic distortion noise level with no input input-output characteristics dynamic automatic gain control (AGC) characteristics gain control linearity current drain immunity to EMI (refer to ANSI C63.19 and IEC 60118-13) This standard describes measurements of output charact

41、eristics when a remote microphone arrangement is used. There are potentially multiple components to HADS (e.g., FM transmitter delivering to an FM receiver connected to a neckloop transmitting to a t-coil in a hearing aid), and several employ output transducers that cannot be measured with standard

42、couplers. This standard does not address measurement of hearing aids or personal sound amplifiers which can be evaluated according to procedures described in ANSI/ASA S3.22. This standard also does not describe measurements of large-area assistive listening systems that are not packaged for individu

43、al coupling to the listeners ear, telephone amplifiers, and alerting devices. The document addresses devices not worn entirely on the body. The standard also excludes measurement of implants and bone conduction devices. These devices require substantially different techniques from those described in

44、 this standard because they do not deliver signals via air conduction to the individuals ear. Some hearing aids may contain conventional amplification and wireless receivers. Conventional amplification via the local microphone should be tested by ANSI/ASA S3.22, and the wireless functionality should

45、 be tested according to this standard. Further descriptions of HADS appear in Clause 3. It is not the intent of this standard to restrict 2014 Acoustical Society of America All rights reserved 2 ANSI/ASA S3.47-2014 the variety of HADS available nor to inhibit in any way advances in the state of the

46、art. In addition, it is not the intent of this standard to provide measurement procedures that can be used to predict in-situ performance. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited ap

47、plies. For undated references, the latest edition of the referenced document (including any amendments) applies. ANSI/ASA S1.1 American National Standard Acoustical Terminology ANSI/ASA S1.6-1984 (R2011) American National Standard Preferred Frequencies, Frequency Levels, and Band Numbers for Acousti

48、cal Measurements ANSI/ASA S3.7-1995 (R2008) American National Standard Method for Coupler Calibration of Earphones ANSI/ASA S3.22-2009 American National Standard Specification of Hearing Aid Characteristics ANSI/ASA S3.25-2010 American National Standard Specification for an Occluded Ear Simulator AN

49、SI/ASA S3.35-2010 American National Standard Method of Measurement of Performance Characteristics of Hearing Aids under Simulated Real-Ear Working Conditions ANSI/ASA S3.42-1992/Part 1 (R2012) American National Standard Testing Hearing Aids with a Broad- Band Noise Signal 3 Definitions 3.1 Terms relating to devices 3.1.1 Hearing aid A hearing aid is any wearable sound amplification device designed for, offered for the purpose of, or represented as aiding persons with hearing loss. In general, hearing aids