| Tinnitus Loudness in Quiet and Noise After Resection of Vestibular Schwannoma. | |
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MedLine Citation:
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PMID: 21221046 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVES:: (1) To use a loudness model to assess the influence of loudness recruitment on estimates of the loudness of tinnitus obtained by loudness matching; (2) To compare the effect of background noise on the loudness of tinnitus for individuals who are unilaterally deaf after resection of vestibular schwannoma (VS) and those with idiopathic tinnitus. BACKGROUND:: After translabyrinthine resection of VS, patients experience unilateral deafness and tinnitus in the operated ear. Most complain that their tinnitus is more bothersome in noisy environments, unlike those with idiopathic tinnitus. PARTICIPANTS:: Unilaterally deaf individuals experiencing tinnitus as a consequence of VS surgery and a comparison group with idiopathic tinnitus. METHODS:: Participants adjusted the level of a probe tone at the frequency where their hearing was best to match the loudness of their tinnitus in quiet; for VS participants, matches were made using a probe in the unaffected ear. Matches were then obtained in the presence of threshold-equalizing noise. RESULTS:: For those with idiopathic tinnitus, the probe loudness level, calculated using a loudness model, was almost invariant with hearing loss at the probe frequency and was usually between 20 and 50 phons. For the VS group, the probe loudness level ranged from 6 to 51 phons. With increasing threshold-equalizing-noise level, the loudness match decreased slightly for the comparison group but increased significantly for the VS group. CONCLUSION:: The tinnitus in quiet had a moderate loudness for both groups. Background noise slightly decreased tinnitus loudness for most participants with idiopathic tinnitus but increased tinnitus loudness for VS participants. We propose 2 possible mechanisms for the effect of noise in the VS group. |
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Authors:
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Thomas Edmund Cope; David M Baguley; Brian C J Moore |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-8 |
Journal Detail:
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Title: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology Volume: - ISSN: 1537-4505 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-1-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100961504 Medline TA: Otol Neurotol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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*Auditory Group, Institute of Neuroscience, The Medical School, University of Newcastle, Newcastle upon Tyne; †Audiology Department, Cambridge University Hospitals NHS Foundation Trust; and ‡Department of Experimental Psychology, University of Cambridge, Cambridge, England, U.K. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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