I.S. EN ISO 389-2:1997现行
Acoustics - Reference Zero for the Calibration of Audiometric Equipment Part 2: Reference Equivalent Threshold Sound Pressure Levels for Pure Tones and Insert Earphones
出版：National Standards Authority of Ireland
专家解读视频
Covers reference equivalent threshold sound pressure levels (RETSPL) for the calibration of pure-tone audiometers supplementary to those specified in I.S. EN ISO 389.
SS EN ISO 389-2 Ed. 1 (1996) - Identical
ISO 389-2:1994 - Identical
NS EN ISO 389-2 Ed. 1 (1996) - Identical
UNI EN ISO 389-2:1997 - Identical
NF EN ISO 389-2:1996 - Identical
NBN EN ISO 389-2:1996 - Identical
SN EN ISO 389-2:1997 - Identical
NEN EN ISO 389-2:1996 - Identical
BS EN ISO 389-2:1997 - Identical
DIN EN ISO 389-2 (1996-10) - Identical
ONORM EN ISO 389-2:1997 - Identical
UNE EN ISO 389-2:1997 - Identical
