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Bilateral fitting of BAHAs and BAHA (R) fitted in unilateral deaf persons: Acoustical aspects
Chalmers University of Technology.ORCID iD: 0000-0003-3350-8997
2005 (English)In: International Journal of Audiology, ISSN 1499-2027, Vol. 44, no 3, 178-189 p.Article in journal (Refereed) Published
Abstract [en]

The benefit of a bone-anchored hearing aid (BAHA) to a patient fitted bilaterally; and the benefit of a BAHA(andREG;) to a unilaterally deaf person was estimated by four acoustical measurements: directional sensitivity of a BAHA(andREG;) placed at the skull, vibration transmission in the skull, gain, and estimated transcranial attenuation of bone conducted sound. Provided a patient has a similar bone conduction hearing ability at both cochlea, it was found that a patient should, theoretically, benefit from bilateral fitting of BAHAs in terms of better hearing thresholds from the front, and better overall hearing ability from the surround. The data indicates further, that bilateral fitting facilitates extraction of interaural cues, which should lead to greater ability to determine the direction of a sound source, as well as better hearing in noise. However, due to the cross-hearing of bone conducted sound, the binaural processing for the patient fitted bilaterally with BAHAs is less than for normal binaural air conduction hearing. Finally, the data showed that the benefit of fitting a BAHA(andREG;) in a unilaterally deaf person, depends on that persons transcranial attenuation.

Place, publisher, year, edition, pages
Informa Healthcare , 2005. Vol. 44, no 3, 178-189 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-59788DOI: 10.1080/14992020500031561ISI: 229159400006OAI: diva2:353347
Available from: 2010-09-25 Created: 2010-09-24 Last updated: 2014-10-08

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Stenfelt, Stefan
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