NBN EN ISO 266:1997现行
GELUIDLEER - VOORKEURFERQUENTIES
出版：Belgian Standards
专家解读视频
Defines preferred frequencies for acoustical measurements, based on the R10 series of preferred numbers in ISO 3 and reference frequency of 1000 Hz.Does not include frequencies for music, all audiometric frequencies or series other than R10 from ISO 3. Nor does it apply when a constant frequency increment, or other particular spacing would be more suitable, or when the adoption or retention of other frequencies is preferable.
Supersedes NBN ISO 266 (11/2003)
SN EN ISO 266:1997 - Identical
NEN EN ISO 266:1997 - Identical
BS EN ISO 266:1997 - Identical
DIN EN ISO 266 (1997-08) - Identical
ONORM EN ISO 266:1997 - Identical
I.S. EN ISO 266:1998 - Identical
UNI EN ISO 266:1998 - Identical
NF EN ISO 266:1997 - Identical
NS EN ISO 266 Ed. 1 (1997) - Identical
ISO 266:1997 - Identical
SS EN ISO 266 Ed. 1 (1997) - Identical
UNE EN ISO 266:1998 - Identical
