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Auditory fatigue is defined as a temporary loss of hearing after exposure to sound. This results in a temporary shift of the auditory threshold known as a ''temporary threshold shift'' (TTS). The damage can become permanent (permanent threshold shift, PTS) if sufficient recovery time is not allowed for before continued sound exposure. When the hearing loss is rooted from a traumatic occurrence, it may be classified as noise-induced hearing loss, or NIHL. There are two main types of auditory fatigue, short-term and long-term.〔Charron, S., & Botte, M. C. (1988). Frequency-selectivity in loudness adaptation and auditory fatigue. (). Journal of the Acoustical Society of America, 83(1), 178-187.〕 These are distinguished from each other by several characteristics listed individually below. Short-term fatigue * full recovery from TTS can be achieved in approximately two minutes * the TTS is relatively independent of exposure duration〔〔Hirsh IJ, Bilger RC, Burns W. Auditory-Threshold Recovery after Exposures to Pure Tones. The Journal of the Acoustical Society of America. 1955;27(5):1013-1013.〕 * TTS is maximal at the exposure frequency of the sound Long-term fatigue * recovery requires a minimum of several minutes but can take up to several days * dependent on exposure duration and noise level〔〔 ==Physiology== 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「Auditory fatigue」の詳細全文を読む スポンサード リンク
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