NS EN ISO 389-7:1998现行
Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 7: Reference Threshold Of Hearing Under Free-Field And Diffuse-Field Listening Conditions (Iso 389-7:2005)
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
1998 [01/05/1998]2005 [01/03/2005]2005 AMD 1 2016 [01/11/2016]2ED 2006 [08/03/2006]1ED 1998 [01/05/1998]
BS EN ISO 389-7:2005+A1:2016 - Identical
UNE EN ISO 389-7:2006 - Identical
EN ISO 389-7:2005 - Identical
ISO 3897:1997 - Identical
SS EN ISO 389-7 Ed. 2 (2005) - Identical
I.S. EN ISO 389-7:2005 - Identical
NBN EN ISO 389-7:2006 - Identical
NF EN ISO 389-7:2006 - Identical
ONORM EN ISO 389-7:2006 - Identical
DIN EN ISO 389-7 (2006-04) - Identical
NEN EN ISO 389-7:2006 - Identical
SN EN ISO 389-7:2006 - Identical
UNI EN ISO 389-7:2016 - Identical
ONORM EN ISO 389-7:2017 - Identical
