指こすり音聴取検査についての検討

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  • A Study on Finger Friction Test.

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A comparative study on the results with finger friction test and pure tone audiometry was undertaken on 77 patients (120 ears) at the ages of 3 to 32 years.<br>The results obtained were as follows.<br>1) If successive rubbing noise produced by a dry index finger and a thumb could not be heard in 50-60cm apart, about 30dB hearing loss at 1000-2000Hz or above without masking could be detected by the examiners. Therefore, it was considered that the finger friction test was available for detecting presbycusis.<br>2) The examiner should confirm that his finger rubbing noise have a property that it's sound pressure increase as the frequency become high, because the noises showed individual difference in frequency property.

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