GB/T 4854.9-2016

Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels

NORMA vydána dne 24.2.2016

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The information about the standard:

Designation standards: GB/T 4854.9-2016
Publication date standards: 24.2.2016
Country: Chinese technical standard
Kategorie: Technické normy GB