BS ISO 389-4:1994被替代
Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Reference Levels For Narrowband Masking Noise
出版：British Standards Institution
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基本信息
标准编号： BS ISO 389-4:1994
发布时间：1995/3/15 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：12
标准简介
Specifies four reference levels for narrow band masking noise presented by air construction from an earphone in pure tone audiometry. Also gives detailed definitions and annexes.BS AMD 10484 RENUMBERS STD
标准备注
© British Standards Institution 2013
Renumbered and superseded by BS EN ISO 389-4.
Supersedes BS 7113(1989) and 86/53942 DC.
(10/2005)
等同采用的国际标准
ISO 389-4:1994 - Identical
