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Auditory spectral integration in the perception of static vowels.
MedLine Citation:
PMID:  21862680     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: To evaluate potential contributions of broadband spectral integration in the perception of static vowels. Specifically, can the auditory system infer formant frequency information from changes in the intensity weighting across harmonics when the formant itself is missing? Does this type of integration produce the same results in the lower (F1) and higher (F2) regions? Does the spacing between the spectral components affect a listener's ability to integrate the acoustic cues? METHOD: Twenty young listeners with normal hearing identified synthesized vowel-like stimuli created for adjustments in the F1 (//-//, /i/-/ε/) and in the F2 region (//-/æ/). There were two types of stimuli: (1) two-formant tokens and (2) tokens in which one formant was removed and two pairs of sine waves were inserted below and above the missing formant; the intensities of these harmonics were modified to cause variations in their spectral center-of-gravity (COG). The COG effects were tested over a wide range of frequencies. RESULTS: Obtained patterns were consistent with calculated changes to the spectral COG, both in F1 and F2 regions. The spacing of the sine waves did not affect listeners' responses. CONCLUSION: The auditory system may perform broadband integration as a type of auditory wideband spectral analysis.
Authors:
Robert Allen Fox; Ewa Jacewicz; Chiung-Yun Chang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-23
Journal Detail:
Title:  Journal of speech, language, and hearing research : JSLHR     Volume:  -     ISSN:  1558-9102     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
The Ohio State University, Columbus, Ohio.
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