Pitch ranking ability of cochlear implant recipients: A comparison of sound-processing strategies
| Autor: | David J. Tsang, Catherine Sucher, Colette M. McKay, Jason W. D. Chew, Hugh J. McDermott, Andrew E. Vandali |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Auditory perception
Speech perception Acoustics and Ultrasonics Computer science Speech recognition medicine.medical_treatment Acoustics Intelligibility (communication) Prosthesis Design computer.software_genre Arts and Humanities (miscellaneous) Vowel Cochlear implant otorhinolaryngologic diseases medicine Octave Humans Inner ear Pitch Perception Audio signal processing Cochlea Aged Aged 80 and over Signal processing Fundamental frequency Middle Aged Noise Cochlear Implants medicine.anatomical_structure Acoustic Stimulation Auditory Perception Speech Perception computer |
| Zdroj: | The Journal of the Acoustical Society of America. 117:3126-3138 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.1874632 |
| Popis: | Pitch ranking of sung vowel stimuli, separated in fundamental frequency (F0) by half an octave, was measured with a group of eleven Nucleus 24 cochlear implant recipients using different sound coding strategies. In three consecutive studies, either two or three different sound coding strategies were compared to the Advanced Combinational Encoder (ACE) strategy. These strategies included Continuous Interleaved Sampling (CIS), Peak Derived Timing (PDT), Modulation Depth Enhancement (MDE), F0 Synchronized ACE (FOSync), and Multi-channel Envelope Modulation (MEM), the last four being experimental strategies. While pitch ranking results on average were poor compared to those expected for most normal hearing listeners, significantly higher scores were obtained using the MEM, MDE, and FOSync strategies compared to ACE. These strategies enhanced coding of temporal F0 cues by providing deeper modulation cues to F0 coincidentally in time across all activated electrodes. In the final study, speech recognition tests were also conducted using ACE, CIS, MDE, and MEM. Similar results among all strategies were obtained for word tests in quiet and between ACE and MEM for sentence tests in noise. These findings demonstrate that strategies such as MEM may aid perception of pitch and still adequately code segmental speech features as per existing coding strategies. |
| Databáze: | OpenAIRE |
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