BS 2497-7:1988
Withdrawn
Date published:
Standard reference zero for the calibration of pure tone air conduction audiometers, Specification for a standard reference zero at frequencies intermediate between those given in Parts 5 and 6 of BS 2497
Reference equivalent threshold sound pressure levels supplementary to those specified for earphones and couplers in Part 5 and for earphones and artificial ears in Part 6.
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Related Information
11.040.01 Medical equipment in general
17.140.50 Electroacoustics
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BS 2497-7:1988
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