Gives electroacoustical performance specifications for three kinds of sound measuring instruments: - a conventional sound level meter that measures exponential time-weighted sound level; - an integrating-averaging sound level meter that measures time-average sound level; and - an integrating sound level meter that measures sound exposure level. A single instrument may make any, or all, of the three kinds of measurements. Two performance categories, class 1 and class 2, are specified in this standard. In general, specifications for class 1 and class 2 sound level meters have the same design goals and differ mainly in the tolerance limits and the range of operational temperatures. Tolerance limits for class 2 specifications are greater than, or equal to, those for class 1 specifications. Sound level meters conforming to the requirements of this standard have a specified frequency response for sound incident on the microphone from one principal direction in an acoustic free field or from random directions.

IEC 60651 Ed. 1.2

IEC 60804 Ed. 2.0

IEC 60804 Ed. 1.0

IEC 60651 Ed. 1.0

IEC 61672-1 Ed. 2.0

UNE EN 61672-1:2005 - Identical

SS EN 61672-1 Ed. 1 (2003) - Identical

PN EN 61672-1:2005 - Identical

AS IEC 61672.1-2004 - Identical

NEN EN IEC 61672-1:2003 - Identical

OVE/ONORM EN 61672-1:2005 - Identical

BIS IS 15575-1:2005 - Identical

I.S. EN 61672-1:2003 - Identical

NF EN 61672-1:2003 - Identical

CEI EN 61672-1 Ed. 1 (2003) - Identical

SN EN 61672-1:2003 - Identical

BS EN 61672-1:2003 - Identical

DIN EN 61672-1 (2003-10) - Identical

JIS C 1509-1:2005 - Identical