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Middle ear ossicles motion at hearing thresholds with air conduction and bone conduction stimulation
Linköping University, Faculty of Health Sciences. Linköping University, Department of Neuroscience and Locomotion, Technical Audiology.ORCID iD: 0000-0003-3350-8997
2006 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 119, no 5, 2848-2858 p.Article in journal (Refereed) Published
Abstract [en]

Hearing threshold data with bone conduction and air conduction stimulation are combined with physiological and mechanical measurements of the middle ear ossicles vibration to compute the vibration level of the ossicles at threshold stimulation. By comparing the displacements of the stapes footplate with the two stimulation modalities and assuming the vibration of the stapes footplate to be the input to the cochlea when stimulation is by air conduction, the importance of middle ear ossicles inertia with bone conduction stimulation is evaluated. Given the limitations of the analysis, the results indicate that the inertia of the middle ear is not an important contribution to the perception of BC sound for frequencies below 1.5 kHz, it seems to contribute to perception of bone conducted sound between the frequencies 1.5 and 3.5 kHz. At frequencies above 4 kHz, the analysis failed since the input to the cochlea is probably not through the oval window with bone conduction stimulation. Comparison of basilar membrane vibration data verified the calculations for frequencies between 0.8 and 3.5 kHz. It was also found that the fluid flow at the round window, rather than at the oval window, reflects the stimulation of the basilar membrane with bone conduction stimulation. © 2006 Acoustical Society of America.

Place, publisher, year, edition, pages
2006. Vol. 119, no 5, 2848-2858 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-35648DOI: 10.1121/1.2184225Local ID: 28049OAI: diva2:256496
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-10-08

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Stenfelt, Stefan
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