[Bone conduction receiver for the measurement of the auditory thresholds over a broad frequency range].

A piesoelectric bony telephone for determining audible thresholds while sound is conducted through the bone over expanded frequency range of 0.25 kHz up to 20.0 kHz is described. Fundamental limitations of electromagnetic bony telephones preventing them from metering audible thresholds at the frequencies greater than 6 kHz have been revealed. Analysis of the piesoelectric transducer equivalent circuit has demonstrated on principle the possibility to measure audible thresholds with such a device over the expanded frequency range to 20 kHz. A model of piesoelectric bony telephone conforming the IEC recommendations is described and some experimental results obtained for the frequency range of 0.25 kHz to 20.0 kHz are presented.