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Tinnitus retraining therapy (TRT) is a form of habituation therapy designed to help people who suffer from tinnitus, a ringing, buzzing, hissing, or other sound in the ears when no external sound is present. Two key components of TRT directly follow from the neurophysiological model of tinnitus. One of these principles includes directive counseling aimed at reclassification of tinnitus to a category of neutral signals, while the other includes sound therapy〔Tinnitus Retraining Therapy Implementing the Neurophysiological Model, Jastreboff, P.J. and Hazell, J.W.P. (2004). Cambridge University Press, Cambridge〕 which is aimed at weakening tinnitus related neuronal activity. The goal of TRT is management of tinnitus; there is no evidence that TRT can attenuate or eliminate tinnitus. An alternative to TRT is tinnitus masking, the use of noise, music or other environmental sounds to obscure or mask the tinnitis, similar to the way flowery or other scents can be used to cover up bad odors. Hearing aids can provide a partial masking effect for the condition. Results from a review of tinnitus retraining therapy trials indicate that it may be a more effective treatment than tinnitus masking. ==Prevalence of tinnitus== In a recent survey, 50 million American adults (20%) reported any tinnitus, and 6.5 million adults (6.5%) reported frequent tinnitus in the past year. 2 million adults (1.3%) are unable to lead a normal life. While tinnitus gets more common with advancing age and is most prevalent from age 60-69, many children also have tinnitus,and may be at risk for learning disabilities. Tinnitus and hyperacusis are frequently a consequence of, or accompaniment to high frequency hearing loss, though persons with normal hearing can exhibit tinnitus without other symptoms. According to one survey, 80% of those with significant hearing loss have tinnitus, and 80% of those with tinnitus have measurable hearing loss. That's a high correlation, but not quite strong enough to rise to the level of causation.〔(【引用サイトリンク】title=Issues in Tinnitus 2014-2015 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tinnitus retraining therapy」の詳細全文を読む スポンサード リンク
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