聴覚疲労の回復形式と騒音感受性の関係

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タイトル別名
  • THE RELATIONSHIP BETWEEN THE RECOVERY PATTERN IN AUDITORY FATIGUE AND THE NOISE SUSCEPTIBILITY
  • チョウカク ヒロウ ノ カイフク ケイシキ ト ソウオン カンジュセイ ノ カンケイ

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説明

As one of the approaches to study the prevention of noise trauma, it is important to determine the noise susceptibility of the individual. It is a fact that there are individual differences in the susceptibility of the auditory organs to noise sti- mulus. In order to devise a method of predicting this noise susceptibility, an investigation was made into the temporary auditory fatigue after noise stimulation and the recovery pattern from it. <br>The results obtained were as follows: <br>1) The temporary threshold shift (T.T.S.) following the stimulation with white noise for one minute shows a sharp rise when the stimulus noi- se pressure reaches 85 to 90db (SL). <br>2) The bounce seen in the recovery process of audition is most apt to be detected with the stimulus noise at 4000to 5000cps for I to 2 minu- tes. <br>3) The bounce appears at 85db (SL) of the stimulus noise pressure, reaches its maximum at 90db (SL), and almost disappears at 100db (SL). <br>4) Low-cycled tinnitus and recruitment begin to appear at 90db (SL) of the stimulus noise pressure. <br>5) From the initial stimulus noise pressure to induce bounce, viewed in relation to T.T.S., tinnitus and recruitment, the critical intensity of noise was estimated and a method of predicting the noise susceptibility.

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