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INTENSITY DISCRIMINATION IN SINGLE AND MULTI-ELECTRODE
PATTERNS IN COCHLEAR IMPLANTS
by
Ashmita Gaur
A Thesis Presented to the
FACULTY OF THE VITERBI SCHOOL OF ENGINEERING
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(BIOMEDICAL ENGINEERING)
May 2007
Copyright 2007 Ashmita Gaur
Object Description
| Title | Intensity discrimination in single and multi-electrode patterns in cochlear implants |
| Author | Gaur, Ashmita |
| Author email | ashmitag@usc.edu |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Biomedical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2007-03-15 |
| Date submitted | 2007 |
| Restricted until | Restricted until 5 April 2009. |
| Date published | 2009-04-05 |
| Advisor (committee chair) | Shannon, Robert |
| Advisor (committee member) |
Meng, Ellis Greene, Ernest |
| Abstract | Single-channel psychophysics may not reflect performance with dynamic, multi-channel stimuli (e.g., speech stimuli) in cochlear implant (CI) listeners due to interactions between electrodes at the periphery or due to central processing interactions or both. The first part of the study measured single and multi-channel intensity discrimination in 5 Nucleus CI users, as functions of the relative level, electrode location and stimulation rate of the masker and probe electrodes. Spatial distance and relative stimulation levels between interleaved pairs of electrodes were found to significantly influence the degree of channel interaction. The second part of the study investigated how temporal offset between interleaved pulses may affect channel interaction at suprathreshold levels in 3 Nucleus CI users. Results showed that interactions were elevated for short temporal offsets and were reduced as the temporal offset was increased to half the stimulation period. |
| Keyword | cochlear implants; psychophysics |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m350 |
| Rights | Gaur, Ashmita |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Gaur-20070405 |
| Archival file | uscthesesreloadpub_Volume29/etd-Gaur-20070405.pdf |
Description
| Title | Page 1 |
| Full text | INTENSITY DISCRIMINATION IN SINGLE AND MULTI-ELECTRODE PATTERNS IN COCHLEAR IMPLANTS by Ashmita Gaur A Thesis Presented to the FACULTY OF THE VITERBI SCHOOL OF ENGINEERING UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (BIOMEDICAL ENGINEERING) May 2007 Copyright 2007 Ashmita Gaur |
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