GB/T 4854.1-1999

Acoustics—Reference zero for the calibration of audiometric equipment—Part 1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones

NORMA vydaná dňa 8.3.1999

The information about the standard:

Designation standards: GB/T 4854.1-1999
Note: NEPLATNÁ
Publication date standards: 8.3.1999
Country: Chinese technical standard
Kategória: Technické normy GB