Frequency following responses to tone glides: Effects of frequency extent, direction, and electrode montage

Curtis Billings, William J. Bologna, Ramesh Kumar Muralimanohar, Brandon M. Madsen, Michelle Molis

Research output: Contribution to journalArticle

Abstract

The spectral (frequency) and amplitude cues in speech change rapidly over time. Study of the neural encoding of these dynamic features may help to improve diagnosis and treatment of speech-perception difficulties. This study uses tone glides as a simple approximation of dynamic speech sounds to better our understanding of the underlying neural representation of speech. The frequency following response (FFR) was recorded from 10 young normal-hearing adults using six signals varying in glide direction (rising and falling) and extent of frequency change ([Formula presented], [Formula presented], and 1 octave). In addition, the FFR was simultaneously recorded using two different electrode montages (vertical and horizontal). These factors were analyzed across three time windows using a measure of response strength (signal-to-noise ratio) and a measure of temporal coherence (stimulus-to-response correlation coefficient). Results demonstrated effects of extent, montage, and a montage-by-window interaction. SNR and stimulus-to-response correlation measures differed in their sensitivity to these factors. These results suggest that the FFR reflects dynamic acoustic characteristics of simple tonal stimuli very well. Additional research is needed to determine how neural encoding may differ for more natural dynamic speech signals and populations with impaired auditory processing.

Original languageEnglish (US)
JournalHearing Research
DOIs
StatePublished - Jan 1 2019

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Electrodes
Speech Perception
Phonetics
Signal-To-Noise Ratio
Acoustics
Hearing
Cues
Research
Population
Direction compound
Therapeutics

ASJC Scopus subject areas

  • Sensory Systems

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Frequency following responses to tone glides : Effects of frequency extent, direction, and electrode montage. / Billings, Curtis; Bologna, William J.; Muralimanohar, Ramesh Kumar; Madsen, Brandon M.; Molis, Michelle.

In: Hearing Research, 01.01.2019.

Research output: Contribution to journalArticle

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