Evidence of across-channel processing for spectral-ripple discrimination in cochlear implant listeners

Spectral-ripple discrimination has been used widely for psychoacoustical studies in normal-hearing, hearing-impaired, and cochlear implant listeners. The present study investigated the perceptual mechanism for spectral-ripple discrimination in cochlear implant listeners. The main goal of this study...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2011-10, Vol.130 (4), p.2088-2097
Main Authors: Ho Won, Jong, Jones, Gary L., Drennan, Ward R., Jameyson, Elyse M., Rubinstein, Jay T.
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Adult
Aged
Audiometry
Audition
Auditory Threshold
Biological and medical sciences
Cochlear Implantation - instrumentation
Cochlear Implants
Correction of Hearing Impairment - psychology
Cues
Discrimination (Psychology)
Diseases of the ear
Ent and stomatology
Fundamental and applied biological sciences. Psychology
Humans
Medical sciences
Middle Aged
Perception
Persons With Hearing Impairments - psychology
Persons With Hearing Impairments - rehabilitation
Prosthesis Design
Psychoacoustics
Psychological Acoustics
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Recognition (Psychology)
Sound Spectrography
Speech Perception
Time Factors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Spectral-ripple discrimination has been used widely for psychoacoustical studies in normal-hearing, hearing-impaired, and cochlear implant listeners. The present study investigated the perceptual mechanism for spectral-ripple discrimination in cochlear implant listeners. The main goal of this study was to determine whether cochlear implant listeners use a local intensity cue or global spectral shape for spectral-ripple discrimination. The effect of electrode separation on spectral-ripple discrimination was also evaluated. Results showed that it is highly unlikely that cochlear implant listeners depend on a local intensity cue for spectral-ripple discrimination. A phenomenological model of spectral-ripple discrimination, as an "ideal observer," showed that a perceptual mechanism based on discrimination of a single intensity difference cannot account for performance of cochlear implant listeners. Spectral modulation depth and electrode separation were found to significantly affect spectral-ripple discrimination. The evidence supports the hypothesis that spectral-ripple discrimination involves integrating information from multiple channels.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3624820