I.S. EN ISO 389-3:2016现行
Acoustics - Reference Zero for the Calibration of Audiometric Equipment Part 3: Reference Equivalent Threshold Vibratory Force Levels for Pure Tones and Bone Vibrators (iso 389-3:2016)
出版：National Standards Authority of Ireland
专家解读视频
Defines the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry; b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler; and c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test.
NEN EN ISO 389-3:2016 - Identical
NBN EN ISO 389-3:2016 - Identical
NF EN ISO 389-3:2016 - Identical
UNE EN ISO 389-3:2016 - Identical
SN EN ISO 389-3:2016 - Identical
NS EN ISO 389-3:2016 - Identical
UNI EN ISO 389-3:2016 - Identical
EN ISO 389-3:2016 - Identical
ONORM EN ISO 389-3:2016 - Identical
