Effects of broadband noise on cortical evoked auditory responses at different loudness levels in young adults

Mridula Sharma; Suzanne C Purdy; Kevin J Munro; Kathleen Sawaya; Varghese Peter

doi:10.1097/WNR.0000000000000089

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Effects of broadband noise on cortical evoked auditory responses at different loudness levels in young adults

Journal article

Peer reviewed

Effects of broadband noise on cortical evoked auditory responses at different loudness levels in young adults

Mridula Sharma, Suzanne C Purdy, Kevin J Munro, Kathleen Sawaya and Varghese Peter

NeuroReport, Vol.25(5), pp.312-319

2014

DOI: https://doi.org/10.1097/WNR.0000000000000089

PMID: 24323122

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Abstract

Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)

Sensory Processes, Perception and Performance

broadband noise

cortical auditory evoked potentials

loudness level

signal-to-noise ratio

Young adults with no history of hearing concerns were tested to investigate their /da/-evoked cortical auditory evoked potentials (P1–N1–P2) recorded from 32 scalp electrodes in the presence and absence of noise at three different loudness levels (soft, comfortable, and loud), at a fixed signal-to-noise ratio (+3 dB). P1 peak latency significantly increased at soft and loud levels, and N1 and P2 latencies increased at all three levels in the presence of noise, compared with the quiet condition. P1 amplitude was significantly larger in quiet than in noise conditions at the loudest level. N1 amplitude was larger in quiet than in noise for the soft level only. P2 amplitude was reduced in the presence of noise to a similar degree at all loudness levels. The differential effects of noise on P1, N1, and P2 suggest differences in auditory processes underlying these peaks. The combination of level and signal-to-noise ratio should be considered when using cortical auditory evoked potentials as an electrophysiological indicator of degraded speech processing.

Details

Title: Effects of broadband noise on cortical evoked auditory responses at different loudness levels in young adults
Authors: Mridula Sharma (Author) - Macquarie University
Suzanne C Purdy (Author) - Macquarie University
Kevin J Munro (Author) - University of Manchester
Kathleen Sawaya (Author) - St Michael's Hospital
Varghese Peter (Author) - Western Sydney University
Publication details: NeuroReport, Vol.25(5), pp.312-319
Publisher: Lippincott Williams & Wilkins
DOI: 10.1097/WNR.0000000000000089
ISSN: 1473-558X
PMID: 24323122
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Behavioural Sciences - Legacy; School of Social Sciences - Legacy; School of Health - Psychology
Language: English
Record Identifier: 99534307402621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Neurosciences

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