BS EN ISO 389:1997被替代
Acoustics. Standard reference zero for the calibration of pure tone air conduction audiometers
出版：British Standards Institution
专家解读视频
Specifies reference equivalent threshold sound pressure levels for Beyer DT 48, telephonics TDH 39 earphones in a coupler complying with IEC 60303 and supra-aural earphones, meeting stated requirements, in an artificial ear complying with IEC 60318.
© British Standards Institution 2013
Amendment notes:
AMD 9442 published 15 April 1997
Document identifier notes:
Formerly BS 2497:1992.
SS EN ISO 389 Ed. 1 (1996) - Identical
UNE EN ISO 389:1996 - Identical
NF EN ISO 389:1995 - Identical
ISO 389:1991 - Identical
SN EN ISO 389:1996 - Identical
NEN EN ISO 389:1995 - Identical
DIN EN ISO 389 (1995-11) - Identical
I.S. EN ISO 389:1996 - Identical
