BS 2497-5:1988
Withdrawn
Date published:
Standard reference zero for the calibration of pure tone air conduction audiometers, Specification for a standard reference zero using an acoustic coupler complying with BS 4668
Reference equivalent threshold sound pressure levels for two earphones, Beyer DT 48 with flat cushion and Telephonics TDH 39 with MC 41/AR cushion, in a form suitable for calibration.
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Related Information
11.040.01 Medical equipment in general
17.140.50 Electroacoustics
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BS 2497-5:1988
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