Noise-induced enhancement of envelope following responses in normal-hearing adults

Measures of signal-in-noise neural encoding may improve understanding of the hearing-in-noise difficulties experienced by many individuals in everyday life. Usually noise results in weaker envelope following responses (EFRs); however, some studies demonstrate EFR enhancements. This experiment tested...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2020-02, Vol.147 (2), p.EL201-EL207
Main Authors: Billings, Curtis J., Gordon, Samuel Y., McMillan, Garnett P., Gallun, Frederick J., Molis, Michelle R., Konrad-Martin, Dawn
Format: Article
Language:English
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Jasa Express Letters
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Summary:Measures of signal-in-noise neural encoding may improve understanding of the hearing-in-noise difficulties experienced by many individuals in everyday life. Usually noise results in weaker envelope following responses (EFRs); however, some studies demonstrate EFR enhancements. This experiment tested whether noise-induced enhancements in EFRs are demonstrated with simple 500- and 1000-Hz pure tones amplitude modulated at 110 Hz. Most of the 12 young normal-hearing participants demonstrated enhanced encoding of the 110-Hz fundamental in a noise background compared to quiet; in contrast, responses at the harmonics were decreased in noise relative to quiet conditions. Possible mechanisms of such an enhancement are discussed.
ISSN:0001-4966
1520-8524
DOI:10.1121/10.0000627