
SOUND LEVEL METERS
出版:International Electrotechnical Committee

专家解读视频
Defines instruments (sound level meters) for the measurement of certain frequency and time weighted sound pressure levels.
DIN IEC 60651 : 1981 - Identical
NEN EN IEC 60651 : 94 AMD 2 2001 - Identical
NFS 31 109 : 1991 - Similar to
BS 5969(1981) : 1981 - Identical
DIN EN 60651 : 1994 AMD 2 2003 - Identical
NEN 10651 : 94 AMD 1 1994 - Identical
UNE 20464 : 1990 - Identical
NFS 31 009 : CORRIGENDUM 87 - Similar to
CEI EN 60651 : 3ED 2002 - Identical
I.S. EN 60651:1994 - Identical
NBN C 97 122 : 1983 - Identical