BS 2497-2:1969

Date published: 10/03/71

Specification for a reference zero for the calibration of pure-tone audiometers, Data for certain earphones used in commercial practice

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Specifies value of sound pressure level corresponding to audiometric zero for monaural earphone listening to pure tones of certain stated frequencies.

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: 11.040.01 Medical equipment in general

17.140.50 Electroacoustics

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