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Hidden hearing loss Shuji Izumi 1 1Department of Otolaryngology Head and Neck Surgery, Niigata University Graduate School of Medical and Dental Sciences Keyword: hidden hearing loss , cochlear synaptopathy , シナプス , 雑音下聴取 , synapse , speech perception in noise pp.69-73
Published Date 2023/6/15
DOI https://doi.org/10.11477/mf.6001200420

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  • Abstract
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 Hidden hearing loss is a concept of auditory disfunction caused by cochlear synaptopathy and characterized by reduced speech perception in noise with normal pure tone threshold. Kujawa and Liberman reported in 2009 that acoustic exposure in mice reduced synapses between inner hair cells and cochlear nerves with no hair cell loss. This is called cochlear synaptopathy. Synaptic loss is greater in low SR neurons among the subtypes of cochlear nerve and it is considered to cause speech perception reduction in noise with normal pure tone threshold. Hidden hearing loss is possibly one of the causes of the unsolved problem of “hearing sounds but not words.” However, cochlear synaptopathy has not been confirmed in humans, therefore a diagnostic method for hidden hearing loss in humans has not been established. Many studies are currently underway. Note that auditory processing disorder (APD) which shows the same symptom of “hearing sounds but not words” is a different concept that should not be confused with hidden hearing loss.


Copyright © 2023, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会

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