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Experimental studies on the acoustic properties of mastoid cavities

  • N. S. Tolley (a1), K. Ison (a1) and A. Mirza (a1)

Abstract

This study investigated the effects of open-mastoid surgery upon ear canal resonance. In particular an attempt was made to alter resonant properties by obliterating each cavity with silastic foam. The results from this study showed that open-mastoid surgery significantly decreased resonant frequency without producing an effect upon either the peak amplitude or the quality of the resonant peak as defined by the Q-factor.

Restoring the natural resonance properties of an operated ear, if indicated, is likely to be a difficult objective to achieve in surgical terms.

Copyright

Corresponding author

Mr N. S. Tolley, Flat 9, Belle Vue Court, Belle View Gardens, Brighton BN2 2AN

References

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Djupesland, G., Zwislocki, J. J. (1972) Sound pressure distribution in the outer ear. Scandinavian Audiology, 1: 197203.
Evans, R. A., Day, A., Browning, G. G. (1989) Open mastoid surgery: Its effect on the acoustics of the external ear canal. Clinical Otolaryngology, 14: 317321.
McKenzie, K., Dempster, J. H. (1990) External ear resonance in children with otitis media with effusion. Clinical Otolaryngology, 15: 415420.
Wiener, F. M., Ross, D. A. (1946) The pressure distribution in the auditory canal in a progressive sound field. Journal of the Acoustic Society of America, 18: 401–108.

Keywords

Experimental studies on the acoustic properties of mastoid cavities

  • N. S. Tolley (a1), K. Ison (a1) and A. Mirza (a1)

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