Journal article
The role of pitch and harmonic cancellation when listening to speech in harmonic background sounds
The Journal of the Acoustical Society of America, Vol.145(5), pp.3011-3023
05/01/2019
DOI: 10.1121/1.5102169
PMID: 31153349
Abstract
Fundamental frequency differences ( Delta F0) between competing talkers aid in the perceptual segregation of the talkers ( Delta F0 benefit), but the underlying mechanisms remain incompletely understood. A model of DF0 benefit based on harmonic cancellation proposes that a masker's periodicity can be used to cancel ( i.e., filter out) its neural representation. Earlier work suggested that an octave Delta F0 provided little benefit, an effect predicted by harmonic cancellation due to the shared periodicity of masker and target. Alternatively, this effect can be explained by spectral overlap between the harmonic components of the target and masker. To assess these competing explanations, speech intelligibility of a monotonized target talker, masked by a speech-shaped harmonic complex tone, was measured as a function of Delta F0, masker spectrum ( all harmonics or odd harmonics only), and masker temporal envelope ( amplitude modulated or unmodulated). Removal of the masker's even harmonics when the target was one octave above the masker improved speech reception thresholds by about 5 dB. Because this manipulation eliminated spectral overlap between target and masker components but preserved shared periodicity, the finding is consistent with the explanation for the lack of Delta F0 benefit at the octave based on spectral overlap, but not with the explanation based on harmonic cancellation. (C) 2019 Acoustical Society of America.
Details
- Title: Subtitle
- The role of pitch and harmonic cancellation when listening to speech in harmonic background sounds
- Creators
- Daniel R. Guest - University of MinnesotaAndrew J. Oxenham - University of Minnesota
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.145(5), pp.3011-3023
- DOI
- 10.1121/1.5102169
- PMID
- 31153349
- NLM abbreviation
- J Acoust Soc Am
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Publisher
- Acoustical Soc Amer Amer Inst Physics
- Number of pages
- 13
- Grant note
- UMN Department of Psychology Summer Graduate Fellowship UMN College of Liberal Arts Graduate Fellowship NRT-UtB1734815 / NSF; National Science Foundation (NSF) R01 DC005216 / NIH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA R01DC005216 / National Institute on Deafness and Other Communication Disorders; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD)
- Language
- English
- Date published
- 05/01/2019
- Academic Unit
- Communication Sciences and Disorders
- Record Identifier
- 9985217033902771
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