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No change in the acoustic reflex threshold and auditory brainstem response following short-term acoustic stimulation in normal hearing adults

Brotherton, H; Plack, CJ; Schaette, R; Munro, KJ; (2016) No change in the acoustic reflex threshold and auditory brainstem response following short-term acoustic stimulation in normal hearing adults. Journal of the Acoustical Society of America , 140 (4) pp. 2725-2734. 10.1121/1.4964733. Green open access

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Abstract

Unilateral auditory deprivation or stimulation can induce changes in loudness and modify the sound level required to elicit the acoustic reflex. This has been explained in terms of a change in neural response, or gain, for a given sound level. However, it is unclear if these changes are driven by the asymmetry in auditory input or if they will also occur following bilateral changes in auditory input. The present study used a cross-over trial of unilateral and bilateral amplification to investigate changes in the acoustic reflex thresholds (ARTs) and the auditory brainstem response (ABR) in normal hearing listeners. Each treatment lasted 7 days and there was a 7-day washout period between the treatments. There was no significant change in the ART or ABR with either treatment. This null finding may have occurred because the amplification was insufficient to induce experience-related changes to the ABR and ART. Based on the null findings from the present study, and evidence of a change in ART in previous unilateral hearing aid use in normal hearing listeners, the threshold to trigger adaptive changes appears to be around 5 days of amplification with real ear insertion gain greater than 13–17 dB.

Type: Article
Title: No change in the acoustic reflex threshold and auditory brainstem response following short-term acoustic stimulation in normal hearing adults
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/1.4964733
Publisher version: http://dx.doi.org/10.1121/1.4964733
Language: English
Additional information: © 2016 Acoustical Society of America. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Life Sciences & Biomedicine, Acoustics, Audiology & Speech-Language Pathology, Computational Model, Adaptive Plasticity, Deprivation, Loudness, Tinnitus, System, Gain
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > The Ear Institute
URI: https://discovery.ucl.ac.uk/id/eprint/1523493
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