GOST R ISO 389-3-2011 State system for ensuring the uniformity of measurements Acoustics Reference zero for the calibration of audiometric equipment Part 3 Reference equivalent thrs fo.pdf

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4、ound pressure levels of bone vibrators for pure tones 201212011 , :a) (), . , (. 5.3) , - (). , - .b) .c) , , . . 8253-1.2 . - , . 389-1:1998 . . 1. - ( 389-1:1998 Acoustics Reference zero for the calibration of audiometric equipment Part 1:Reference equivalent threshold sound pressure levels for pu

5、re tones and supra-aural earphones)1 389-32011 389-2:1994 . . 2. ( 389-2:1994 Acoustics Reference zero for the calibration of audiometric equipment Part 2:Reference equivalent threshold sound pressure levels for pure tones and insert earphones) 60318-6:2007 . . 6. (IEC 60318-6 ed1.0 (2007-11),Electr

6、oacoustics Simulators of human head and ear Part 6: Mechanical coupler for the measurement onbone vibrators)3 389-1, 389-2, - :3.1 (bone conduction): .3.2 (bone vibrator): , .3.3 () alternating force level (of a vibration), : , , , 1 .3.4 (mechanical coupler): , , - . 60318-6.3.5 ( ) equivalent thre

7、shold force level (monaural listening): , - , , , .3.6 ()1)referenceequivalent threshold force level (RETFL): - 18 30 , .3.7 ( ) hearing level (of a pure tone): , ( ) , - ( , ) - ( - ) , . .3.8 (occlusion effect): , , - , - . .1) , RETFL. , . - 3.6 - , 27072-86.2 389-320113.9 (masking): , - () , , .3.10 ( ) (datum level of masking noise): 1/3- , (. 3.7), , 1/3- 35 , .1 35 , , . .2 389-4.3.11 (critical bandwidth): , - .3.12 (vibrotactile threshold level): , 50 % -