Document Detail

The importance of temporal fine structure information in speech at different spectral regions for normal-hearing and hearing-impaired subjects.
MedLine Citation:
PMID:  20329859     Owner:  NLM     Status:  MEDLINE    
Speech reception thresholds (SRTs) were measured for target and competing-speech signals, processed to contain variable amounts of temporal fine structure (TFS) information. Signals were filtered into 30 1-ERB(N) wide channels (where ERB(N) refers to the bandwidth of normal auditory filters), which were either tone vocoded, preserving temporal envelope information (extracted using the Hilbert transform), or left unprocessed, containing both TFS and envelope information. Improvements in SRT were compared when TFS was progressively introduced, starting with the high- or low-frequency channels. The results suggest some redundancy in the TFS information across frequency regions. In a second experiment, the signal was divided into five, 6-ERB(N)-wide spectral regions, four of which were tone vocoded. The remaining region was either absent (creating a spectral notch) or was present and unprocessed. SRTs were measured for normal-hearing and hearing-impaired subjects. Conditions where all channels were vocoded or unprocessed were also included. Normal-hearing subjects benefited similarly when TFS information was added to each region, suggesting that TFS information is important over a wide frequency range. Hearing-impaired subjects benefited less, although the benefit varied across subjects. Benefit from TFS information in speech was correlated with a psychophysical measure of TFS sensitivity obtained at two center frequencies.
Kathryn Hopkins; Brian C J Moore
Related Documents :
16078729 - Auditory brainstem and middle latency responses to 1 khz tones in noise-masked normally...
9307819 - Comparison of real and simulated hearing impairment in subjects with unilateral and bil...
7593919 - Critical bandwidth for phase discrimination in hearing-impaired listeners.
14570239 - Impact on hearing aid targets of measuring thresholds in db hl versus db spl.
20185949 - Narrow-band evoked oto-acoustic emission from ears with normal and pathologic conditions.
2751489 - Role of high-frequency audiometry in the early detection of ototoxicity. ii. clinical a...
7101739 - The spatial grain of the perifoveal visual field.
14749319 - On the relation between object shape and grasping kinematics.
22142889 - A novel test to determine the significance of neural selectivity to single and multiple...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  127     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-24     Completed Date:  2010-06-17     Revised Date:  2014-02-19    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1595-608     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Acoustic Stimulation
Auditory Threshold / physiology
Hearing / physiology*
Hearing Disorders / physiopathology*
Speech Perception / physiology*
Grant Support
G0701870//Medical Research Council; //Medical Research Council

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

Previous Document:  A reanalysis of McGurk data suggests that audiovisual fusion in speech perception is subject-depende...
Next Document:  Consonant identification in consonant-vowel-consonant syllables in speech-spectrum noise.