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This Document Has Been Superseded
A newer publication replaces it: BSI BS EN ISO 389-3
Specification for a standard reference zero for the calibration of pure tone bone conduction audiometers
Specification for a standard reference zero for the calibrat
Gives reference equivalent threshold force levels for the hearing threshold of otologically normal persons, aged between 18 and 30 years by bone conduction audiometry.
Essential characteristics of the bone vibrator and its coupling to both the test subject and the mechanical coupler.
Essential characteristics and datum level of the masking noise applied to the ear not under test.
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