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Influence of ear canal occlusion and static pressure difference on bone conduction thresholds: Implications for mechanisms of bone conduction
Ealing General Hospital.
Cambridge University.
Ealing General Hospital.
Chalmers University of Technology.ORCID iD: 0000-0003-3350-8997
2005 (English)In: International Journal of Audiology, ISSN 1499-2027, Vol. 44, no 5, 302-306 p.Article in journal (Refereed) Published
Abstract [en]

The effect of air pressure change on bone conduction (BC) hearing thresholds in the occluded ear was investigated. The pump manometer system of an impedance bridge was used to change the air pressure in the ear canal of twenty-two normally hearing subjects. BC thresholds were measured with: (1) open ear; (2) the ear canal occluded with a probe tube and application of 0 daPa air pressure; and (3) the ear canal occluded with a probe tube and application of -350 daPa air pressure. Thresholds were lower in condition 2 than in condition 1, the difference decreasing from 27 dB at 2500 Hz to 4.5 dB at 2000 Hz. Thresholds were higher in condition 3 than in condition 2. The results are interpreted in terms of changes in the relative contribution of the three routes of transmission for BC sound produced by occlusion and by a static pressure difference.

Place, publisher, year, edition, pages
Informa Healthcare , 2005. Vol. 44, no 5, 302-306 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-59796DOI: 10.1080/14992020500060669ISI: 230350200006OAI: diva2:353338
Available from: 2010-09-25 Created: 2010-09-24 Last updated: 2014-10-08

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Stenfelt, Stefan
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