1、 389-12011 1 ISO 389-1:1998Acoustics Reference zero for the calibration of audiometric equipment Part 1:Reference equivalent threshold sound pressure levels for pure tones andsupra-aural earphones(IDT) 27 2002 . 184- , 1.02004 . 1 - ( ) , 42 358 3 1 2011 . 671-4 389-1:1998 . - . 1. (ISO 389-1:1998 A
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3、 . , () - 9 (, ), - 303:1970 ( 60318-3). , - 389, . - , , 389. , - , Telephonics TDH 39 -MX41/AR ( 51) Beyer DT 48. , 60318-3., , - . , , , . . , , - . , , 318:1970 ( 60318-1:2009). , 1 389:1985, , , - 60318-1. , - . - . , 1, - , - . , . 1 389:1985 389:1991. 389, 1 125 8000 1500, 3000 6000 . - 750 ,
4、 - 2 389:1985. - , 266. 2 1/3-1258000.- . 2 .III 389-12011 750 , . - , , . , 389:1985 2, , 389-3 . . , 389:1985. , 389:1985, - 1 389.IV 389-12011 1 State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometricequipment . Part 1. Reference equi
5、valent threshold sound pressure levels of pure tones for supra-aural earphones 201212011 - - . , 60318-3, , 4.3 60318-1. , , , -. .2 . - , . 60318-1:2009 . . 1. (IEC 60318-1:2009 Electroacoustics Simulatorsofhumanheadandear Part1:Earsimulatorforthemeasurementofsupra-auralandcircumauralearphones) 603
6、18-3:1998 . . 3. , (IEC 60318-3:1998Electroacoustics Simulators of human head and ear Part 3: Acoustic coupler for the calibration ofsupra-aural earphones used in audiometry)3 :3.1 (air conduction): - .1 389-12011 3.2 (acoustic coupler): , , - , .3.3 (artificial ear): ,- , .1 , .2 60318-1.3.4 (thres
7、hold of hearing): , -50%.3.5 (ontologically normal person): - , , - , , .3.6 equivalent threshold soundpressure level (monaural earphone listening): , , -, .3.7 ()1)referenceequivalent threshold sound pressure level (RETSPL): 18 30 , . 7029.3.8 ( ) hearing level (of pure tone): - , .3.9 ( ) hearing threshold level (of a givenear): , - . ., , 6189 8253-1.4 4.1 () - , .4.2 Beyer DT 48 Telephonics TDH 39 , 60318-3, 1.1) , RETSPL. , . 3.7 - , 2707286.2 389-12011 1 , 60318-3 f, Beyer DT 48 Telephonics TDH 39a MX41/AR ( 51) ( 20 ), 1251602002503154005006307508001000125015001600200025
