Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-05T03:55:24.336Z Has data issue: false hasContentIssue false

Experimental studies on the acoustic properties of mastoid cavities

Published online by Cambridge University Press:  29 June 2007

N. S. Tolley*
Affiliation:
The Royal National Throat, Nose and Ear Hospital, Gray's Inn Road, London WC1X 8DA.
K. Ison
Affiliation:
The Royal National Throat, Nose and Ear Hospital, Gray's Inn Road, London WC1X 8DA.
A. Mirza
Affiliation:
The Royal National Throat, Nose and Ear Hospital, Gray's Inn Road, London WC1X 8DA.
*
Mr N. S. Tolley, Flat 9, Belle Vue Court, Belle View Gardens, Brighton BN2 2AN

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.

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Djupesland, G., Zwislocki, J. J. (1972) Sound pressure distribution in the outer ear. Scandinavian Audiology, 1: 197203.CrossRefGoogle Scholar
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.Google Scholar
McKenzie, K., Dempster, J. H. (1990) External ear resonance in children with otitis media with effusion. Clinical Otolaryngology, 15: 415420.CrossRefGoogle Scholar
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.CrossRefGoogle Scholar