NS EN ISO 389-1 Ed. 1 (2000)现行
Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 1: Reference Equivalent Threshold Sound Pressure Levels For Pure Tones And Supra-aural Earphones
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Defines a standard reference zero for the scale of hearing threshold level that applies to pure-tone air conduction audiometers, intended to promote uniformity and agreement in the expression of hearing threshold level measurements worldwide.
NEN EN ISO 389-1:2000 - Identical
SS EN ISO 389-1 Ed. 1 (2000) - Identical
UNE EN ISO 389-1:2001 - Identical
I.S. EN ISO 389-1:2000 - Identical
ISO 389-1:1998 - Identical
SN EN ISO 389-1:2000 - Identical
UNI EN ISO 389-1:2000 - Identical
NF EN ISO 389-1:2000 - Identical
ONORM EN ISO 389-1:2000 - Identical
DIN EN ISO 389-1 (2000-09) - Identical
BS EN ISO 389-1:2000 - Identical
NBN EN ISO 389-1 Ed. 2 (2000) - Identical
NEN EN ISO 389-1:2018 - Identical
EN ISO 389-1:2018 - Identical
BS EN ISO 389-1:2018 - Identical
