GOST R ISO 8253-2-2012 Acoustics Audiometric test methods Part 2 Sound field audiometry with pure-tone and narrow-band test signals《声学 听力测试方法 第2部分 纯音及窄带测试信号声场测听法》.pdf

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3、rt 2. Sound field audiometry with pure-tone and narrow-band test signals 201312011 ( ) -, , - , , . , , - 125 8000 , 20 16000 . -, . , , . .2 : 226 . (ISO 226, Acoustics Normalequal-loudness-level contours) 266 . (ISO 266, Acoustics Preferred frequencies) 389-7 . . 7. (ISO 389-7, Acoustics Reference

4、 zero for the calibration of audiometric equipment Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions) 8253-1:2010 . . 1. - (ISO 8253-1:2010, Acoustics Audiometric testmethods Part 1: Basic pure-tone air and bone conduction threshold audiometry) 60581-7 . -

5、 . 7. (IEC 60581-7, Highfidelity audio equipment and systems Minimum performance requirements Part 7: Loudspeakers) 60645-1 . . 1. (IEC 60645-1, Electroacoustics Audiometric equipment Part 1: Equipment forpure-tone audiometry) 61672-1 . . 1. (IEC 61672-1,Electroacoustics Sound level meters Part 1: S

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7、8 25 - .3.8 (hearing level): .3.9 (hearing threshold level): - , - .3.10 (- ) (carrier frequency of afrequency-modulated tone): . .3.11 (frequency deviation): - .3.12 (free sound field): , .3.13 (quasi-free sound field): , . 5.4.3.14 (diffuse sound field): , - , .3.15 (white noise): , .3.16 () (nois

8、e bandwidth): - .2 8253-22012 - .3.17 () (centre frequency of a noiseband): .3.18 ( ) (functional gain of a hearing aid): - .4 4.1 : , .4.2 , - 5.2. - . - 60645-1 - 266. c1771,5 % . 1 2 60645-1.4.3 , :a) ;b) ;c) ;d) . 60645-1 266. . - . c1773 % . 4 20 , c17710 % . 5 %. 5 % - , 10 %.4.4 - 60645-1. . 1 , - , . 2 , , , - , , .3 8253-220124.5 , - , 5 % 125 3 % 250, 500 1000 . . .