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American Journal of Audiology Vol.1 58-62 March 1992.
© American Speech-Language-Hearing Association
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Probe-Tube Microphone Measures of Vent Effects With In-the-Canal Hearing Aid Shells

Andrew Stuart 1, Robert Stenstrom 2, Odilia MacDonald 3, Mark P. Schmidt 4, and Gail MacLean 1

1 School of Human Communication Disorders, Dalhousie University, Halifax, Nova Scotia
2 Children's Hospital of Eastern Ontario, Ottawa, Ontario
3 Glace Bay, Nova Scotia
4 Unitron Industries Ltd., Kitchener, Ontario

The acoustic effects of three different configurations of vented in-the-canal (ITC) hearing aid shells were investigated. Real-ear sound pressure level measures (200–2000 Hz) were obtained from unvented and vented ITC shells from 12 adult subjects. In general, with increasing vent size, an increase in the amount of low-frequency reduction and an upward shift in vent kneepoints and vent-associated resonance occurred. The use of venting may be considered clinically for low-frequency reduction in ITC hearing aid frequency responses.

Key Words: in-the-canal hearing aid, venting effects, probe-tube microphone measures

Submitted on May 11, 1991
Accepted on August 14, 1991






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