

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.
Indice de classement: S31-009 Supersedes NFS 31 009 and NFS 31 009 PROJET (09/2003)
SN EN 60651:1994 - Identical
SS EN 60651:1996 - Identical
UNE EN 60651:1996 - Identical
I.S. EN 60651:1994 - Identical
NBN EN 60651:1996 - Identical
BS EN 60651:1994 - Identical