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BS 7135-1 1989 Edition, August 31, 1989
Complete Document
Superseded By: BS EN ISO 7779
Noise Emitted by Computer and Business Equipment Part 1: Method of Measurement of Airborne Noise
Includes all amendments and changes through Amendment 1, April 1, 1992
Additional Comments: W/D S/S BY BS EN ISO 7779
Page Count:46
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Methods for determining the A-weighted sound power levels based on measurements in reverberant rooms or in free-field conditions over a reflecting plane, and A-weighted sound pressure levels at the operator or bystander positions.