BS EN ISO 389:1997

Acoustics. Standard reference zero for the calibration of pure tone air conduction audiometers.

NORMA vydaná dňa 28.2.1992

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The information about the standard:

Designation standards: BS EN ISO 389:1997
Note: NEPLATNÁ
Publication date standards: 28.2.1992
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: British technical standard
Kategória: Technické normy BS