|| IEC 61672-1 ed1.0 withdrawn corrigendum
|| Electroacoustics - Sound level meters - Part 1: Specifications
||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
A single instrument may make any, or all, of the three kinds of
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.
This English-language version is derived from the original bilingual
publication by leaving out all French-language pages. Missing page
numbers correspond to the French-language pages.
||29 - Electroacoustics
*Including sound level meters
|Work in progress