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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
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Available format(s): Hardcopy, PDF
Superseded date: 31-01-1992
Language(s): English
Published date: 29-02-1988
Publisher: British Standards Institution
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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