NS EN ISO 389-2 Ed. 1 (1996)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：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Defines reference equivalent threshold sound pressure level (RETSPL) for calibrating pure-tone audiometers supplementary to those in ISO 389:1991.
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
NBN EN ISO 389-2:1996 - Identical
I.S. EN ISO 389-2:1997 - Identical
ISO 389-2:1994 - Identical
SS EN ISO 389-2 Ed. 1 (1996) - Identical
NF EN ISO 389-2:1996 - Identical
UNI EN ISO 389-2:1997 - Identical
UNE EN ISO 389-2:1997 - Identical
