ISO 389-7:2005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：International Organization for Standardization
专家解读视频
BS EN ISO 389-7:2005 - Identical
NEN EN ISO 389-7:2006 - Identical
SN EN ISO 389-7:2006 - Identical
SS EN ISO 389-7 Ed. 2 (2005) - Identical
SS ISO 389-7 Ed. 1 (1997) - Identical
UNE EN ISO 389-7:2006 - Identical
DIN EN ISO 389-7 (2006-04) - Identical
ONORM EN ISO 389-7:2006 - Identical
NF EN ISO 389-7:2006 - Identical
NBN EN ISO 389-7:2006 - Identical
UNI EN ISO 389-7:2006 - Identical
I.S. EN ISO 389-7:2005 - Identical
NS EN ISO 389-7 Ed. 2 (2006) - Identical
PN EN ISO 389-7:2006 - Identical
EN ISO 389-7:2005 - Identical
