
Acoustics - Preferred Frequencies (iso 266:1997)
出版:National Standards Authority of Ireland

专家解读视频
Describes preferred frequencies for acoustical Measurements, these preferred frequencies are based on the RIO series of preferred numbers in IS0 3 and the reference frequency of 1000 Hz.
NBN EN ISO 266:1997 - Identical
ONORM EN ISO 266:1997 - Identical
DIN EN ISO 266 (1997-08) - Identical
BS EN ISO 266:1997 - Identical
NEN EN ISO 266:1997 - Identical
SN EN ISO 266:1997 - Identical
UNI EN ISO 266:1998 - Identical
ISO 266:1997 - Identical
NS EN ISO 266 Ed. 1 (1997) - Identical
NF EN ISO 266:1997 - Identical
UNE EN ISO 266:1998 - Identical
SS EN ISO 266 Ed. 1 (1997) - Identical