BS 2497:1954

The normal threshold of hearing for pure tones by earphone listening.

NORMA vydaná dňa 30.7.1954

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The information about the standard:

Designation standards: BS 2497:1954
Note: NEPLATNÁ
Publication date standards: 30.7.1954
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: British technical standard
Kategória: Technické normy BS