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Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow-band masking noise.
STANDARD published on 1.7.1999
Designation standards: DIN EN ISO 389-4:1999-07
Publication date standards: 1.7.1999
SKU: NS-245824
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: German technical standard
Category: Technical standards DIN
Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 4: Bezugspegel für schmalbandige Verdeckungsgeräusche.
1.3.2005
WITHDRAWN
1.4.2006
WITHDRAWN
1.9.2000
1.10.1996
WITHDRAWN
1.7.1999
WITHDRAWN
1.7.2013
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