DICHOTIC SPEECH RECOGNITION: ACOUSTIC AND ELECTRIC HEARING
| Author: |
Mani, Arun Vijay |
| Advisor: |
Philip Loizou |
| URL: |
http://www.utdallas.edu/~loizou/thesis/arun_ms_thesis.pdf
" target="_blank"> http://www.utdallas.edu/~loizou/thesis/arun_ms_thesis.pdf
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| Completion Date: |
May 2004 |
| Degree: |
M.Sc./M.A. |
| Institution: |
University of Texas at Dallas |
| Abstract: |
It is generally accepted that the fusion of two speech signals presented dichotically is affected by the relative onset time. This study investigated the hypothesis that spectral resolution might be an additional factor influencing spectral fusion when the spectral information is split and presented dichotically to the two ears. Two different methods of splitting the spectral information were investigated. In the first method, the odd-index channels were presented to one ear and the even-index channels to the other ear. In the second method the lower frequency channels were presented to one ear and the high frequency channels to the other ear. The experiments were conducted with both normal hearing listeners and bilateral cochlear implant listeners. Results with normal hearing listeners indicated that spectral resolution did affect spectral fusion. Results with bilateral cochlear implant users indicated that subjects were able to fuse information presented to the two ears accurately in quiet but not in noise. |
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