1、 IEC TS 60318-7 Edition 2.0 2017-04 TECHNICAL SPECIFICATION Electroacoustics Simulators of human head and ear Part 7: Head and torso simulator for the measurement of air-conduction hearing aids IEC TS 60318-7:2017-04(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Genev
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11、 Part 7: Head and torso simulator for the measurement of air-conduction hearing aids INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 17.140.50 ISBN 978-2-8322-4166-0 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an auth
12、orized distributor. colour inside 2 IEC 60318-7:2017 IEC 2017 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 Construction 11 4.1 General . 11 4.2 Geometrical dimensions of the manikin . 12 4.2.1 Head and torso 12 4.2.2 Pinna simulators for hearing aid measuremen
13、ts . 13 4.2.3 Ear canal extension . 14 4.2.4 Ear simulator . 16 4.2.5 Materials . 17 4.3 Acoustical characteristics of the manikin . 17 4.3.1 Free-field frequency response . 17 4.3.2 Diffuse-field frequency response 19 4.3.3 Acceptance intervals . 20 4.3.4 Openings . 20 5 Calibration . 21 5.1 Refere
14、nce environmental conditions . 21 5.2 Calibration method 21 5.2.1 General . 21 5.2.2 Test signal, test space and measurement equipment . 21 5.2.3 Measurement of sound pressure level 22 5.2.4 Alignment of manikin azimuth and elevation 23 5.2.5 Test for sound leakage 23 6 Marking and instruction manua
15、l . 23 6.1 Markings of the manikin 23 6.2 Instruction manual 23 7 Maximum permitted uncertainty of measurements . 24 Annex A (informative) Design example of an anatomically shaped manikin 26 Annex B (informative) Design examples of a geometrically shaped manikin . 27 Annex C (informative) Relationsh
16、ip between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement . 29 Annex D (informative) 3D representation of example pinna simulators . 30 D.1 Background. 30 D.2 Scanning technique 30 D.3 Examples of pinna simulator shape . 30 D.4 Verification
17、 of conformance . 31 Bibliography 32 Figure 1 Manikin geometrical references 10 Figure 2 Coordinate scheme for azimuth and elevation angles . 11 Figure 3 Illustration of manikin head and torso dimensions 12 Figure 4 Illustration of manikin pinna simulator dimensions 15 Figure A.1 Example of an anato
18、mically shaped manikin . 26 IEC 60318-7:2017 IEC 2017 3 Figure B.1 Example 1 of a geometrically shaped manikin . 27 Figure B.2 Example 2 of a geometrically shaped manikin . 28 Figure C.1 Relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty
19、of measurement . 29 Figure D.1 (Embedded 3D PDFs) Examples of a pinna simulator 31 Table 1 Manikin head and torso dimensions . 13 Table 2 Dimensions of the pinna simulator and the cylindrical ear canal extension of the manikin . 16 Table 3 Dimensions of the pinna simulator and the tapered ear canal
20、extension of the manikin . 16 Table 4 Free-field frequency response of the manikin for an azimuth angle of 0 (right ear) 18 Table 5 Free-field frequency responses of the manikin for azimuth angles of 90, 180 and 270 (right ear) 19 Table 6 Diffuse-field frequency response of the manikin (right ear) 2
21、0 Table 7 Maximum permitted uncertainty U maxfor type approval measurements 25 4 IEC 60318-7:2017 IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROACOUSTICS SIMULATORS OF HUMAN HEAD AND EAR Part 7: Head and torso simulator for the measurement of air-conduction hearing aids FOREWORD 1) The
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34、y of an agreement on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. IEC TS 60318-7, which is a Technical Specification, has been prepared by IEC technical committee 29
35、: Electroacoustics. IEC 60318-7:2017 IEC 2017 5 This publication contains attached files in the form of 3D PDF files. These files are intended to be used as a complement and do not form an integral part of the publication. This second edition cancels and replaces the first edition published in 2011.
36、 This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the document is based on the designs of three different commonly used types of manikins; b) the cross sections of the head and torso and pinna si
37、mulators of the previous edition are replaced by maximum and minimum values of their geometric dimensions; c) the diffuse field frequency response of the manikin is added; d) the usable frequency range is extended to 100 Hz to 16 000 Hz; e) in addition to the cylindrical ear canal extension a tapere
38、d ear canal extension is added; f) design examples of one anatomically shaped manikin and of two different geometrically shaped manikins are given in the annexes; g) the relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement ar
39、e given in an annex; h) 3D representations of three different types of pinna simulators are given in an annex. The text of this technical specification is based on the following documents: Enquiry draft Report on voting 29/907/DTS 29/921A/RVDTS Full information on the voting for the approval of this
40、 technical specification can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 60318 series, published under the general title Electroacoustics Simulators of human head and ear,
41、can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdr
42、awn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its cont
43、ents. Users should therefore print this document using a colour printer. 6 IEC 60318-7:2017 IEC 2017 ELECTROACOUSTICS SIMULATORS OF HUMAN HEAD AND EAR Part 7: Head and torso simulator for the measurement of air-conduction hearing aids 1 Scope This document, which is a Technical Specification, descri
44、bes a head and torso simulator, or manikin, intended for the measurement of air-conduction hearing aids in the frequency range from 100 Hz to 16 000 Hz. The manikin described in this document is intended for airborne acoustic measurements only. It is not suitable for measurements which depend upon v
45、ibration transmission paths such as bone conduction, or for measurements requiring the simulation of bone or tissue. This document specifies the manikin in terms of both its geometrical dimensions and its acoustical properties. Only manikins compliant with both sets of specifications are in conforma
46、nce with this document. WARNING It is acknowledged that devices conforming to this document are used as the basis for applications extending beyond this scope, for example the measurement of sound sources close to the ear or of hearing protection devices. In such cases, it is recommended that any ne
47、cessary design variations are documented, and that a statistical analysis of the measurement data is carried out to determine the level of repeatability that can be achieved. It will also be necessary to assess the relevance of the measurements made with the head and torso simulator to the applicati
48、on in question. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced doc
49、ument (including any amendments) applies. IEC 60118-8, Electroacoustics Hearing aids Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions IEC 60318-4, Electroacoustics Simulators of human head and ear Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by means of ear inserts IEC 61260-1, Electroacoustics Octave-band and fractional-octave-band filters Part
