Zero-crossing based compression hearing aid
The motivation of this thesis research was to develop an experimental compression hearing aid that would allow fast attackhelease compression without excessive waveform distortions such as those produced by conventional envelope-based (EVB) compression hearing aids. A zero-crossing-based (ZXB) proce...
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| Format: | Thesis |
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2008
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| Online Access: | http://hdl.handle.net/10356/3337 |
| _version_ | 1826113769983442944 |
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| author | Tan, Chin Tuan. |
| author2 | Chang, Joseph Sylvester |
| author_facet | Chang, Joseph Sylvester Tan, Chin Tuan. |
| author_sort | Tan, Chin Tuan. |
| collection | NTU |
| description | The motivation of this thesis research was to develop an experimental compression hearing aid that would allow fast attackhelease compression without excessive waveform distortions such as those produced by conventional envelope-based (EVB) compression hearing aids. A zero-crossing-based (ZXB) processing scheme for fast attackhelease compression was proposed. The efficacy of a single-channel and two multichannel ZXB compression hearing aids was evaluated by comparing the speech perceptual performances of these three hearing aids with those of a single-channel linear hearing aid and a conventional single-channel fast attackhelease EVB compression hearing aid. The NST consonant test was administered on two hearing impaired subjects. The results showed that the speech perceptual performances of the ZXB hearing aids were better than those of the linear and EVB compression hearing aids. Analysis of the confusion matrices in terms of articulatory features showed that the superior performance of the ZXB hearing aids can be attributed to the successfulamplification of low intensity consonants by the ZXB compression process which reduces substantially the waveform distortions introduced by the conventional EVB process. |
| first_indexed | 2024-10-01T03:28:40Z |
| format | Thesis |
| id | ntu-10356/3337 |
| institution | Nanyang Technological University |
| last_indexed | 2024-10-01T03:28:40Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/33372023-07-04T15:39:03Z Zero-crossing based compression hearing aid Tan, Chin Tuan. Chang, Joseph Sylvester School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing The motivation of this thesis research was to develop an experimental compression hearing aid that would allow fast attackhelease compression without excessive waveform distortions such as those produced by conventional envelope-based (EVB) compression hearing aids. A zero-crossing-based (ZXB) processing scheme for fast attackhelease compression was proposed. The efficacy of a single-channel and two multichannel ZXB compression hearing aids was evaluated by comparing the speech perceptual performances of these three hearing aids with those of a single-channel linear hearing aid and a conventional single-channel fast attackhelease EVB compression hearing aid. The NST consonant test was administered on two hearing impaired subjects. The results showed that the speech perceptual performances of the ZXB hearing aids were better than those of the linear and EVB compression hearing aids. Analysis of the confusion matrices in terms of articulatory features showed that the superior performance of the ZXB hearing aids can be attributed to the successfulamplification of low intensity consonants by the ZXB compression process which reduces substantially the waveform distortions introduced by the conventional EVB process. Doctor of Philosophy (EEE) 2008-09-17T09:27:44Z 2008-09-17T09:27:44Z 2000 2000 Thesis http://hdl.handle.net/10356/3337 Nanyang Technological University application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing Tan, Chin Tuan. Zero-crossing based compression hearing aid |
| title | Zero-crossing based compression hearing aid |
| title_full | Zero-crossing based compression hearing aid |
| title_fullStr | Zero-crossing based compression hearing aid |
| title_full_unstemmed | Zero-crossing based compression hearing aid |
| title_short | Zero-crossing based compression hearing aid |
| title_sort | zero crossing based compression hearing aid |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing |
| url | http://hdl.handle.net/10356/3337 |
| work_keys_str_mv | AT tanchintuan zerocrossingbasedcompressionhearingaid |