Long term evaluation of sound localization in single sided deaf adults fitted with a BAHA device
Nicolas‐Xavier Bonne Jean‐Noël Hanson Fanny Gauvrit Michaël Risoud Christophe Vincent
First published: 28 May 2019 https://doi.org/10.1111/coa.13381
This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/coa.13381
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Abstract
Objective
To perform a long term evaluation of the localization capabilities in the horizontal plane of single‐sided deaf patients fitted with a BAHA device.
Design
Single center retrospective study.
Participants
Twenty one adults with single sided deafness (SSD) with normal hearing in the contralateral ear (pure tone average <20 dB, SDS >90%) rehabilitated with a Cochlear BAHA device from 2003 to 2012 on the deaf side over a median follow‐up of 8 years.
Outcome measures
The task used in this paper is a sound localization identification task with a setup of 7 loudspeakers on a semi‐circular array at 30‐degree intervals performed at 3 periods: before BAHA, initially and at last follow‐up. Our main criterion of judgment was the RMS localization error. In addition, the Bern Benefit in Single‐Sided Deafness Questionnaire (BBSS) was administered.
Results
The mean RMS localization error was initially estimated at 64° without any rehabilitation (for a chance level RMS estimated at 81°). Initially with the BAHA device, the RMS localization error dropped to 51°. At the last follow‐up evaluation, a significant decrease at 23° was noted. Concerning the Bern Questionnaire, 19% of the patients (n=4) did not report any change (score of 0), 33% (n=7) are satisfied (score of +1 or +2) and 48% (n=10) are very satisfied with the BAHA device (score better than +3).
Conclusion
Improvement of sound localization in the horizontal plane for some SSD patients is likely related to altered processing of monaural spectral cues. The time needed to learn to use the azimuth‐dependent spectral cues takes time. Long‐term follow‐up should be considered for studies investigating sound localization performance.
This article is protected by copyright. All rights reserved.
Nicolas‐Xavier Bonne Jean‐Noël Hanson Fanny Gauvrit Michaël Risoud Christophe Vincent
First published: 28 May 2019 https://doi.org/10.1111/coa.13381
This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/coa.13381
ePDFPDFTOOLS SHARE
Abstract
Objective
To perform a long term evaluation of the localization capabilities in the horizontal plane of single‐sided deaf patients fitted with a BAHA device.
Design
Single center retrospective study.
Participants
Twenty one adults with single sided deafness (SSD) with normal hearing in the contralateral ear (pure tone average <20 dB, SDS >90%) rehabilitated with a Cochlear BAHA device from 2003 to 2012 on the deaf side over a median follow‐up of 8 years.
Outcome measures
The task used in this paper is a sound localization identification task with a setup of 7 loudspeakers on a semi‐circular array at 30‐degree intervals performed at 3 periods: before BAHA, initially and at last follow‐up. Our main criterion of judgment was the RMS localization error. In addition, the Bern Benefit in Single‐Sided Deafness Questionnaire (BBSS) was administered.
Results
The mean RMS localization error was initially estimated at 64° without any rehabilitation (for a chance level RMS estimated at 81°). Initially with the BAHA device, the RMS localization error dropped to 51°. At the last follow‐up evaluation, a significant decrease at 23° was noted. Concerning the Bern Questionnaire, 19% of the patients (n=4) did not report any change (score of 0), 33% (n=7) are satisfied (score of +1 or +2) and 48% (n=10) are very satisfied with the BAHA device (score better than +3).
Conclusion
Improvement of sound localization in the horizontal plane for some SSD patients is likely related to altered processing of monaural spectral cues. The time needed to learn to use the azimuth‐dependent spectral cues takes time. Long‐term follow‐up should be considered for studies investigating sound localization performance.
This article is protected by copyright. All rights reserved.
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