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 T S 60318-7:2017-04(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva,S
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11、orso simulator for the measurement of air-conduction hearing aids INT ERNAT IONAL ELECT ROT ECHNICAL COMMISSION ICS 17.140.50 ISBN 978-2-8322-4166-0 Registered t rademark of the Internat ional Electrotechnica l Commission Warning!Mak e sure that you obtained this publication from an authorized distr
12、ibutor.colourinside 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 measurements.13 4.2.3 Ear cana
13、l 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 Reference environmental conditions.21 5.2 Ca
14、libration 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 manual.23 6.1 Markings of the manikin.23 6.2 Instr
15、uction 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)Relationship between tolerance interval,corresponding acceptance in
16、terval 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 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 F
