PMID: 9638825Jun 25, 1998Paper

A miniaturized artificial mastoid using a skull simulator

Scandinavian Audiology
S P Stenfelt, B Håkansson

Abstract

A miniaturized artificial mastoid of size and weight that allow calibration and measurement of bone conduction hearing aids in a conventional audiometric soundproof box has been developed. Its level of mechanical impedance corresponds to the standard IEC 373 (1990) within the frequency range 250 Hz to 8 kHz. The miniaturized artificial mastoid consists of three parts: coupler, skull simulator (TU-1000), and an external electrical correction filter. The coupler is a highly damped mass-spring system designed to give the miniaturized artificial mastoid mechanical impedance in accordance with the standard IEC 373 (1990). It was found that the miniaturized artificial mastoid yielded results that are in correspondence with results obtained with the Brüel & Kjaer type 4930 artificial mastoid for frequencies above 450 Hz. Thus, at these frequencies, the miniaturized artificial mastoid can be used for audiometer calibration as well as measurement of bone conduction hearing aids.

References

Apr 1, 1976·The Journal of the Acoustical Society of America·G Flottorp, S Solberg
Jan 1, 1989·Scandinavian Audiology·B Håkansson, P Carlsson

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Citations

Nov 3, 2010·Journal of the American Academy of Audiology·Kristi OedingJessica Kerckhoff
Feb 23, 2012·The Journal of the Acoustical Society of America·Robert H Margolis, Samantha M Stiepan
May 31, 2001·Otolaryngologic Clinics of North America·A TjellströmG Granström

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