UNI EN ISO 389-4 : 1999
Current
Current
The latest, up-to-date edition.
ACOUSTICS - REFERENCE ZERO FOR THE CALIBRATION OF AUDIOMETRIC EQUIPMENT - REFERENCE LEVELS FOR NARROW-BAND MASKING NOISE
Published date
31-05-1999
Defines reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry.
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