剣道によると思われた難聴の臨床的検討と発症機序に関する考察

DOI 被引用文献1件 参考文献12件

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  • Cases with sensorineural hearing loss associated with Japanese fencing, Kendo

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We report 6 cases of Japanese fencing players with sensorineural hearing loss associated in fencing, Kendo. Kendo-associated hearing loss is characterized by notch at 2000Hz, at 4000Hz and both. The hearing loss at 2000Hz initially was reversible, and then became permanent. On the contrary, the hearing loss at 4000Hz is induced by repeated exposure to loud noise(about 120dB)at beating a kendo mask by a bamboo sword. It is also suggested that the hearing loss at 2000Hz is induced by concussion of the inner ear with vibration of the head at a peak frequency of 2000Hz when a bamboo sword beats a kendo mask. Independent appearance and progression of 4000Hz and 2000Hz notches manifest the variety of hearing loss patterns associated with Kendo.

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