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BS 2497-3:1972

Withdrawn Date published:

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Specification for a reference zero for the calibration of pure-tone audiometers, Data for a wide-band artificial ear complying with BS 4669

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Values of sound pressure level corresponding to audiometric zero for monaural earphone listening to pure tones of certain stated frequencies, specified in terms of the sound pressure level set up in an artificial ear conforming to the requirements of BS 4669.

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BS 2497-3:1972

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