BS 2497-2:1969被替代
Specification for a reference zero for the calibration of pure-tone audiometers. Data for certain earphones used in commercial practice
出版：British Standards Institution
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基本信息
标准编号： BS 2497-2:1969
发布时间：1969/2/17 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：0
标准简介
Specifies value of sound pressure level corresponding to audiometric zero for monaural earphone listening to pure tones of certain stated frequencies.
标准备注
© British Standards Institution 2013
Amendment notes:
AMD 705
替代本标准的新标准
