I.S. EN 21680-1:1992
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
ACOUSTICS - TEST CODE FOR THE MEASUREMENT OF AIRBORNE NOISE EMITTED BY ROTATING ELECTRICAL MACHINERY - ENGINEERING METHODS FOR FREE-FIELD CONDITIONS OVER A REFLECTING PLANE
Hardcopy , PDF
10-01-1999
English
08-07-1992
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Covers scope and field of application, definitions, appropriate acoustic environment, instrumentation, installation and operation of the machine undergoing test, the sound pressure levels on the measurement surface, the calculation of surface sound pressure level and sound power level and the information to be recorded and reported.
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