Sound power levels of noise sources. Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane.
STANDARD published on 30.11.1981
Designation standards: BS 4196-4:1981
Note: WITHDRAWN
Publication date standards: 30.11.1981
The number of pages: 30
Approximate weight : 90 g (0.20 lbs)
Country: British technical standard
Category: Technical standards BS