IEC 60645-1-2017 Electroacoustics - Audiometric equipment - Part 1 Equipment for pure-tone and speech audiometry《电声学.测听设备.第1部分 纯音和言语测听设备》.pdf
《IEC 60645-1-2017 Electroacoustics - Audiometric equipment - Part 1 Equipment for pure-tone and speech audiometry《电声学.测听设备.第1部分 纯音和言语测听设备》.pdf》由会员分享,可在线阅读,更多相关《IEC 60645-1-2017 Electroacoustics - Audiometric equipment - Part 1 Equipment for pure-tone and speech audiometry《电声学.测听设备.第1部分 纯音和言语测听设备》.pdf(138页珍藏版)》请在麦多课文档分享上搜索。
1、 IEC 60645-1 Edition 4.0 2017-03REDLINE VERSIONElectroacoustics Audiometric equipment Part 1: Equipment for pure-tone and speech audiometry IEC 60645-1:2017-03 RLV(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise
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10、f you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60645-1 Edition 4.0 2017-03REDLINE VERSIONElectroacoustics Audiometric equipment Part 1: Equipment for pure-tone and speech audiometry INTERNATIONAL ELECTROT
11、ECHNICAL COMMISSION ICS 17.140.50 ISBN 978-2-8322-4111-0 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 60645-1:2017 RLV IEC 2017 CONTENTS FOREWORD . 6 INTRODUCTION . 8 1
12、Scope 10 2 Normative references 10 3 Terms and definitions 12 4 Requirements for specific types of fixed frequency by type and class of audiometer 16 5 General requirements 18 5.1 General safety requirements . 18 5.2 Acoustic safety requirements 18 5.3 Environmental conditions 18 5.4 Warm-up time .
13、18 5.5 Power supply variation 18 5.5.1 Interruption of power supply 18 5.5.2 Mains operation . 18 5.5.3 Battery operation . 18 5.5.4 Other power supplies . 19 5.6 Electromagnetic compatibility 19 5.7 Unwanted sound . 19 5.7.1 General . 19 5.7.2 Unwanted sound from and between any combination of tran
14、sducers 19 5.7.3 Unwanted sound from an earphone . 19 5.7.4 Unwanted sound from a bone vibrator 20 5.7.5 Unwanted sound radiated by an audiometer 20 5.8 Testing of automatic-recording audiometers 20 5.9 Interface connections 20 6 Test signals . 20 6.1 Speech signals . 20 6.1.1 Speech signal general
15、requirements 20 6.1.2 Free-field equivalent earphone output level . 20 6.1.3 Uncorrected earphone output level 21 6.1.4 Loudspeaker output level . 21 6.1.5 Bone vibrator output level 21 6.1.6 Speech signal frequency response 21 6.1.7 Calibration signal . 21 6.1.8 Live voice microphone frequency resp
16、onse 22 6.1.9 Scale reference and output level 22 6.1.10 Distortion requirements for speech signals 22 6.2 Pure tones 23 6.2.1 Frequency range and hearing level range 23 6.2.2 Frequency accuracy acceptance limits . 24 6.2.3 Total harmonic distortion . 24 6.2.4 Rate of frequency change 25 6.2.5 Frequ
17、ency modulation . 25 6.3 External signal sources . 25 6.3.1 Signals 25 IEC 60645-1:2017 RLV IEC 2017 3 6.3.2 Frequency response 26 6.3.3 Playback device input 26 6.3.4 Signal-to-noise ratio for playback device input . 26 6.3.5 Electrical sensitivity . 26 6.3.6 Reference level for external signal sou
18、rce . 26 6.4 Operator and test subject speech communication . 26 6.4.1 General . 26 6.4.2 Operator to test subject speech communication(talk-forward) 27 6.4.3 Test subject to operator speech communication(talk-back) 27 6.4.4 Operator to test subject speech communication for live voice speech audiome
19、try 27 6.4.5 Test subject to operator speech communication for vocal response speech audiometry 27 6.5 Masking sound 27 6.5.1 General . 27 6.5.2 Narrow-band noise 28 6.5.3 Speech weighted noise 30 6.5.4 Other masking sound . 30 7 Transducers 30 7.1 Types of transducers 30 7.2 Headband . 30 7.3 Louds
20、peaker . 30 8 Signal level control 30 8.1 Marking of pure-tone and speech signal level controls 30 8.2 Signal indicator . 31 8.3 Accuracy of Sound pressure level and vibratory force level acceptance limits . 31 8.4 Hearing Signal level control 32 8.4.1 Manual audiometers 32 8.4.2 Automatic-recording
21、 audiometers 32 8.4.3 Accuracy of Signal level control acceptance limits . 32 8.5 Masking sound level control 33 8.5.1 General . 33 8.5.2 Masking sound level 33 8.5.3 Accuracy of Masking sound level acceptance limits . 33 8.5.4 Masking sound level range 33 8.6 Tone Signal switching . 33 8.6.1 Tone S
22、ignal switch for manual audiometers . 33 8.6.2 On/off ratio for manual audiometers . 34 8.6.3 Rise/fall times for manual audiometers 34 8.6.4 Automatic pulsed presentation . 34 8.6.5 Subjects response system 35 8.6.6 Subjects response time for automated test procedures . 35 9 Reference tone 35 9.1 G
23、eneral . 35 9.2 Frequencies 35 9.3 Reference tone level control . 36 9.3.1 Range 36 9.3.2 Intervals 36 9.3.3 Marking . 36 4 IEC 60645-1:2017 RLV IEC 2017 9.3.4 Accuracy Acceptance limits . 36 9.3.5 Operation 36 10 Calibration . 36 11 Electrical output of test signals 37 12 Audiogram format 37 13 Tes
24、t requirements to demonstrate conformity 38 13.1 General . 38 13.2 Environmental conditions and power supply variation 38 13.3 Electromagnetic compatibility 39 13.4 Unwanted sound . 39 13.4.1 Unwanted sound from an earphone . 39 13.4.2 Unwanted sound from a bone vibrator 40 13.4.3 Unwanted sound rad
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