NF EN 60651 : 94 AMD 2 2001被替代
出版：Association Francaise de Normalisation
专家解读视频
Describes instruments (sound level meters) for the measurement of certain frequency and time weighted sound pressure levels. Gives the following characteristics of sound level meters: - directional characteristics; - frequency weighting characteristics; - time weighting, detector and indicator characteristics; - sensitivity to various environments.
I.S. EN 60651:1994 - Identical
DIN EN 60651 : 1994 AMD 2 2003 - Identical
BS EN 60651 : 1994 - Identical
DIN EN 60651 : 1994 AMD 2 2003 - Identical
