Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero using an acoustic coupler complying with BS 4668.
STANDARD published on 29.2.1988
Designation standards: BS 2497-5:1988
Note: WITHDRAWN
Publication date standards: 29.2.1988
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: British technical standard
Category: Technical standards BS