GB/T 4854.7-1999

Acoustics—Reference zero for the calibration of audiometric equipment—Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions

NORMA vydána dne 8.3.1999

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The information about the standard:

Designation standards: GB/T 4854.7-1999
Note: NEPLATNÁ
Publication date standards: 8.3.1999
Country: Chinese technical standard
Kategorie: Technické normy GB