ISO 226:2003现行
Acoustics - Normal equal-loudness-level contours
出版：International Organization for Standardization
专家解读视频
NF ISO 226:2004 - Identical
NEN ISO 226:2003 - Identical
DIN ISO 226 (2006-04) - Identical
BS ISO 226:2003 - Identical
NS 4802:1973 - Similar
BS 3383:1988 - Identical
NBN ISO 226:1992 - Identical
UNI ISO 226:2007 - Identical
GB/T 4963-2007 - Identical
UNE 74003:1992 - Similar
SS ISO 226 Ed. 2 (2004) - Identical
NFS 30 003:1965 - Identical
