I.S. EN ISO 389:1996被替代
Acoustics - Standard Reference Zero for the Calibration of Pure-tone air Conduction Audiometers
出版：National Standards Authority of Ireland
专家解读视频
Covers a standard reference zero for the scale of hearing threshold level applicable to pure-tone air conduction audiometers in order to promote agreement and uniformity in the expression of hearing threshold level measurements throughout the world.
BS EN ISO 389:1997 - Identical
NEN EN ISO 389:1995 - Identical
SN EN ISO 389:1996 - Identical
ISO 389:1991 - Identical
SS EN ISO 389 Ed. 1 (1996) - Identical
UNE EN ISO 389:1996 - Identical
DIN EN ISO 389 (1995-11) - Identical
NF EN ISO 389:1995 - Identical
