Your browser doesn't support javascript.
loading
Hidden Hearing Loss Impacts the Neural Representation of Speech in Background Noise.
Monaghan, Jessica J M; Garcia-Lazaro, Jose A; McAlpine, David; Schaette, Roland.
Afiliación
  • Monaghan JJM; National Acoustic Laboratories, Australian Hearing Hub, Macquarie University, Sydney, NSW 2109, Australia; Macquarie University Hearing & Department of Linguistics, Australian Hearing Hub, Macquarie University, Sydney, NSW 2109, Australia.
  • Garcia-Lazaro JA; Ear Institute, University College London, 332 Grays Inn Road, London WC1X 8EE, UK.
  • McAlpine D; Macquarie University Hearing & Department of Linguistics, Australian Hearing Hub, Macquarie University, Sydney, NSW 2109, Australia; Ear Institute, University College London, 332 Grays Inn Road, London WC1X 8EE, UK.
  • Schaette R; Ear Institute, University College London, 332 Grays Inn Road, London WC1X 8EE, UK. Electronic address: r.schaette@ucl.ac.uk.
Curr Biol ; 30(23): 4710-4721.e4, 2020 12 07.
Article en En | MEDLINE | ID: mdl-33035490
ABSTRACT
Many individuals with seemingly normal hearing abilities struggle to understand speech in noisy backgrounds. To understand why this might be the case, we investigated the neural representation of speech in the auditory midbrain of gerbils with "hidden hearing loss" through noise exposure that increased hearing thresholds only temporarily. In noise-exposed animals, we observed significantly increased neural responses to speech stimuli, with a more pronounced increase at moderate than at high sound intensities. Noise exposure reduced discriminability of neural responses to speech in background noise at high sound intensities, with impairment most severe for tokens with relatively greater spectral energy in the noise-exposure frequency range (2-4 kHz). At moderate sound intensities, discriminability was surprisingly improved, which was unrelated to spectral content. A model combining damage to high-threshold auditory nerve fibers with increased response gain of central auditory neurons reproduced these effects, demonstrating that a specific combination of peripheral damage and central compensation could explain listening difficulties despite normal hearing thresholds.
Asunto(s)
Palabras clave

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enmascaramiento Perceptual / Percepción del Habla / Pérdida Auditiva Provocada por Ruido / Ruido Límite: Animals / Humans / Male Idioma: En Revista: Curr Biol Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Australia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enmascaramiento Perceptual / Percepción del Habla / Pérdida Auditiva Provocada por Ruido / Ruido Límite: Animals / Humans / Male Idioma: En Revista: Curr Biol Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Australia
...