BS EN ISO 389-9:2009

Acoustics. Reference zero for the calibration of audiometric equipment. Preferred test conditions for the determination of reference hearing threshold levels.

NORMA vydaná dňa 28.2.2010

The information about the standard:

Designation standards: BS EN ISO 389-9:2009
Publication date standards: 28.2.2010
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: British technical standard
Kategória: Technické normy BS