BS 7458-1 1991 Edition, June 28, 1991
Test Code for the Measurement of Airborne Noise Emitted by Rotating Electrical Machinery Part 1: Engineering Method for Free-Field Conditions Over a Reflecting Plane
Includes all amendments and changes through Amendment 1, April 1, 1992
Additional Comments: W/D S/S BY BS EN ISO 1680
Published By:British Standards Institution (BSI)
Method, of engineering grade accuracy, of measuring sound pressure levels around a machine, of calculating band power levels and of determining the A-weighted sound power level.