The Effect of Objective Room Acoustic Parameters on Auditory Steady-State Responses

Valentina Zapata Rodriguez, James M. Harte, Cheol-Ho Jeong, Jonas Brunskog

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Verification that Hearing Aids (HA) have been fitted correctly in pre-lingual infants and hard-to-test adults is an important emerging application in technical audiology. These test subjects are unable to undergo reliable behavioral testing, so an objective method is required. Auditory steady-state responses (ASSR), recorded in a sound field is a promising technology to verify the hearing aid fitting. The test involves the presentation of the auditory stimuli via a loudspeaker, unlike the usual procedure of delivering via insert earphones. Room reverberation clearly may significantly affect the features of the stimulus important for eliciting a strong electrophysiological response, and thus complicate its detection. This study investigates the effect of different room acoustic conditions on recorded ASSRs via an auralisation approach using insert earphones. Fifteen normal-hearing listeners were tested using narrow-band (NB) CE-Chirps centered at the octave-bands of 0.5, 1.0, 2.0 and 4.0 kHz. These stimuli were convolved with impulse responses of three rooms simulated using a Green’s function approach to recreate different sound-field conditions. Comparisons with the unmodified stimuli recordings (reference condition) quantified that room acoustics significantly affects the amplitudes of the ASSRs.
    Original languageEnglish
    Title of host publicationProceedings of DAGA 2016
    Number of pages4
    PublisherDeutsche Gesellschaft für Akustik e.V.
    Publication date2016
    Publication statusPublished - 2016
    EventDAGA 2016 Aachen: 42. Jahrestagung für akustik - Die Rheinisch-Westfälische Technische Hochschule, Aachen, Germany
    Duration: 14 Mar 201617 Mar 2016


    ConferenceDAGA 2016 Aachen
    LocationDie Rheinisch-Westfälische Technische Hochschule


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