NEN EN ISO 389-7:2006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
出版：Nederlands Normalisatie Instituut
专家解读视频
2006 AMD 1 2016 [01/08/2016]2006 [01/01/2006]1998 [01/02/1998]
NBN EN ISO 389-7:2006 - Identical
DIN EN ISO 389-7 (2006-04) - Identical
EN ISO 389-7:2005 - Identical
ISO 389-7:2005 - Identical
ISO 3897:1997 - Identical
SS EN ISO 389-7 Ed. 2 (2005) - Identical
NS EN ISO 389-7 Ed. 2 (2006) - Identical
I.S. EN ISO 389-7:2005 - Identical
UNI EN ISO 389-7:2006 - Identical
UNE EN ISO 389-7:2006 - Identical
BS EN ISO 389-7:2005 - Identical
SN EN ISO 389-7:2006 - Identical
ONORM EN ISO 389-7:2017 - Identical
NS EN ISO 389-7:1998 - Identical
BS EN ISO 389-7:2005+A1:2016 - Identical
UNI EN ISO 389-7:2016 - Identical
ONORM EN ISO 389-7:2006 - Identical
NF EN ISO 389-7:2006 - Identical
