Document Detail

Vowel identification by listeners with hearing impairment in response to variation in formant frequencies.
MedLine Citation:
PMID:  21297168     Owner:  NLM     Status:  MEDLINE    
PURPOSE: This study examined the influence of presentation level and mild-to-moderate hearing loss on the identification of a set of vowel tokens systematically varying in the frequency locations of their second and third formants.
METHOD: Five listeners with normal hearing (NH listeners) and five listeners with hearing impairment (HI listeners) identified synthesized vowels that represented both highly identifiable and ambiguous examples of /i/, /[Please see symbol]/, and /[Please see symbol]/.
RESULTS: Response patterns of NH listeners showed significant changes, with an increase in presentation level from 75 dB SPL to 95 dB SPL, including increased category overlap. HI listeners, listening only at the higher level, showed greater category overlap than normal and overall identification patterns that differed significantly from those of NH listeners. Excitation patterns based on estimates of auditory filters suggested smoothing of the internal representations, resulting in impaired formant resolution.
CONCLUSIONS: Both increased presentation level for NH listeners and the presence of hearing loss produced a significant change in vowel identification for this stimulus set. Major differences were observed between NH listeners and HI listeners in vowel category overlap and in the sharpness of boundaries between vowel tokens. It is likely that these findings reflect imprecise internal spectral representations due to reduced frequency selectivity.
Michelle R Molis; Marjorie R Leek
Related Documents :
1880148 - Calculation of the instantaneous centre of rotation for a rigid body.
11701788 - In vivo deterioration of tibial baseplate locking mechanisms in contemporary modular to...
12838578 - Vibration signals from the ft joint can induce phase transitions in both directions in ...
18050008 - Development of a hinge compatible with the kinematics of the knee joint.
22940128 - Rapid skin permeabilization by the simultaneous application of dual-frequency, high-int...
21219748 - Natural-light labeling of tomatoes does not facilitate growth or penetration of salmone...
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2011-02-04
Journal Detail:
Title:  Journal of speech, language, and hearing research : JSLHR     Volume:  54     ISSN:  1558-9102     ISO Abbreviation:  J. Speech Lang. Hear. Res.     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-08-02     Completed Date:  2011-12-28     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1211-23     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Acoustic Impedance Tests
Aged, 80 and over
Analysis of Variance
Auditory Perception*
Auditory Threshold*
Case-Control Studies
Hearing Loss, Sensorineural / physiopathology*
Middle Aged
Models, Biological
Reference Values
Sound Spectrography
Speech Perception*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  How Well Do Children Who Are Internationally Adopted Acquire Language? A Meta-analysis.
Next Document:  Evidence for preserved novel word learning in Down syndrome suggests multiple routes to vocabulary a...