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Updated: Dec 27, 2025

A Method for Tracking the Time Evolution of Steady-State Evoked Potentials
Published on: May 25, 2019
Noise-induced enhancement of envelope following responses in normal-hearing adults
Curtis J Billings1, Samuel Y Gordon1, Garnett P McMillan1
1National Center for Rehabilitative Auditory Research, VA Portland Health Care System, Portland, Oregon 97239, USACurtis.Billings2@va.gov, Samuel.Gordon@va.gov, Garnett.Mcmillan@va.gov, gallunf@ohsu.edu, Michelle.Molis@va.gov, Dawn.Martin@va.gov.
Abstract:
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.
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