Novel sounds as a psychophysiological measure of listening effort in older listeners with and without hearing loss

Bertoli, S. and Bodmer, D.. (2014) Novel sounds as a psychophysiological measure of listening effort in older listeners with and without hearing loss. Clinical neurophysiology, Vol. 125, H. 5. pp. 1030-1041.

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Official URL: http://edoc.unibas.ch/dok/A6338695

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OBJECTIVE: To investigate whether task-irrelevant novel sounds presented during an auditory task can provide information about the level of listening effort. METHODS: Event-related potentials (ERPs) were recorded for novel sounds presented during two Experiments, a frequency discrimination task and a speech-perception-in-noise (SPIN) test, each with varying degrees of task difficulty (easy, medium, hard). Difficulty was adjusted to the individual frequency discrimination threshold and 50% speech recognition signal-to-noise ratio (SNR), respectively. Older listeners (age range 60-86years) with either normal hearing for their age or a mild-to-moderate hearing loss participated. RESULTS: Amplitudes of Novelty P3 and late positive potential (LPP) increased with increasing task difficulty, whereas amplitudes of N1 and N2 decreased. Participants with hearing loss had significantly larger LPP amplitudes in the easy condition of the SPIN test than did normal-hearing listeners. Most correlations between ERP amplitudes and behavioral data were not significant suggesting that listening effort is not a simple equivalent of behavioral performance. CONCLUSIONS: LPP amplitude appeared to be the most sensitive component for capturing listening effort reflecting the arousal level of the listener. SIGNIFICANCE: ERPs to novel sounds could be easily recorded during hearing tests and provide an objective physiological measure of listening effort, thus supplementing behavioral performance data.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Department of Biomedicine, University Hospital Basel > Inner Ear Research (Bodmer)
UniBasel Contributors:Bodmer, Daniel K
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:06 Mar 2015 07:44
Deposited On:06 Mar 2015 07:44

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