Document Detail


Effects of spectral shifting on speech perception in noise.
MedLine Citation:
PMID:  20868733     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present study used eight normal-hearing (NH) subjects, listening to acoustic cochlear implant (CI) simulations, to examine the effects of spectral shifting on speech recognition in noise. Speech recognition was measured using spectrally matched and shifted speech (vowels, consonants, and IEEE sentences), generated by 8-channel, sine-wave vocoder. Measurements were made in quiet and in noise (speech-shaped static noise and speech-babble at 5 dB signal-to-noise ratio). One spectral match condition and four spectral shift conditions were investigated: 2 mm, 3 mm, and 4 mm linear shift, and 3 mm shift with compression, in terms of cochlear distance. Results showed that speech recognition scores dropped because of noise and spectral shifting, and that the interactive effects of spectral shifting and background conditions depended on the degree/type of spectral shift, background conditions, and the speech test materials. There was no significant interaction between spectral shifting and two noise conditions for all speech test materials. However, significant interactions between linear spectral shifts and all background conditions were found in sentence recognition; significant interactions between spectral shift types and all background conditions were found in vowel recognition. Overall, the results suggest that tonotopic mismatch may affect performance of CI users in complex listening environments.
Authors:
Tianhao Li; Qian-Jie Fu
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2010-09-22
Journal Detail:
Title:  Hearing research     Volume:  270     ISSN:  1878-5891     ISO Abbreviation:  Hear. Res.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-06     Completed Date:  2011-03-21     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  7900445     Medline TA:  Hear Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  81-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation
Adult
Audiometry, Pure-Tone
Audiometry, Speech
Auditory Pathways / physiology*
Auditory Threshold
Cochlear Implants
Female
Humans
Male
Noise / adverse effects*
Perceptual Masking*
Recognition (Psychology)*
Signal Processing, Computer-Assisted
Speech Acoustics
Speech Intelligibility*
Speech Perception*
Young Adult
Grant Support
ID/Acronym/Agency:
R01 DC004792/DC/NIDCD NIH HHS; R01 DC004792-09/DC/NIDCD NIH HHS; R01 DC004993/DC/NIDCD NIH HHS; R01DC004972/DC/NIDCD NIH HHS
Comments/Corrections

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