Comparison of peripheral compression estimates using auditory steady-state responses (ASSR) and distortion product otoacoustic emissions (DPOAE)

Gerard Encina Llamas, Bastian Epp, Torsten Dau

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    Abstract

    The healthy auditory system shows a compressive input/output (I/O) function as a result of healthy outer-hair cell function. Hearing impairment often leads to a decrease in sensitivity and a reduction of compression, mainly caused by loss of inner and/or outer hair cells. Compression is commonly estimated based on behavioral procedures (Plack et al., 2004), which are time consuming and rely on assumptions regarding the ability to selectively investigate cochlear processing; or on objective recordings such as otoacoustic emissions (OAEs) (Neely et al., 2003), which allow to selectively study cochlear processing but the interpretation of results for individual data is challenging. Auditory steady-state responses (ASSR) are another objective method which allows fast, reliable and frequency-specific measurements of hearing function. It is investigated here whether ASSR can be used to estimate compression along the peripheral auditory pathway. It is hypothesized that compressive behavior is observed in normal-hearing (NH) listeners while in hearing-impaired (HI) listeners, sensitivity and compression are reduced. ASSR data are later compared to data from distortion-product otoacoustic emissions (DPOAEs) recordings. Results show compressive ASSR I/O functions for NH subjects. For HI subjects, ASSR reveal the loss of sensitivity at low stimulus levels. Growth slopes are smaller (more compressive) in ASSR than in DPOAE I/O functions.
    Original languageEnglish
    Publication date2014
    Number of pages1
    Publication statusPublished - 2014
    Event37th Annual MidWinter Meeting of the Association for Research in Otolaryngology - San Diego, CA, United States
    Duration: 22 Feb 201426 Feb 2014
    Conference number: 37

    Conference

    Conference37th Annual MidWinter Meeting of the Association for Research in Otolaryngology
    Number37
    Country/TerritoryUnited States
    CitySan Diego, CA
    Period22/02/201426/02/2014

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