BS 2497-1:1968
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Specification for a reference zero for the calibration of pure-tone audiometers Data for earphone coupler combinations maintained at certain standardizing laboratories
Hardcopy
23-07-2013
English
20-09-1968
Specifies a standard reference zero for the scale of hearing threshold level applicable to pure-tone audiometers.
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