Speech recognition in noise for cochlear implant listeners: Benefits of residual hearing
Data(s) |
01/04/2004
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Resumo |
The purpose of this study was to explore the potential advantages, both theoretical and applied, of preserving low-frequency acoustic hearing in cochlear implant patients. Several hypotheses are presented that predict that residual low-frequency acoustic hearing along with electric stimulation for high frequencies will provide an advantage over traditional long-electrode cochlear implants for the recognition of speech in competing backgrounds. A simulation experiment in normal-hearing subjects demonstrated a clear advantage for preserving low-frequency residual acoustic hearing for speech recognition in a background of other talkers, but not in steady noise. Three subjects with an implanted "short-electrode" cochlear implant and preserved low-frequency acoustic hearing were also tested on speech recognition in the same competing backgrounds and compared to a larger group of traditional cochlear implant users. Each of the three short-electrode subjects performed better than any of the traditional long-electrode implant subjects for speech recognition in a background of other talkers, but not in steady noise, in general agreement with the simulation studies. When compared to a subgroup of traditional implant users matched according to speech recognition ability in quiet, the short-electrode patients showed a 9-dB advantage in the multitalker background. These experiments provide strong preliminary support for retaining residual low-frequency acoustic hearing in cochlear implant patients. The results are consistent with the idea that better perception of voice pitch, which can aid in separating voices in a background of other talkers, was responsible for this advantage. |
Identificador |
http://espace.library.uq.edu.au/view/UQ:13239/UQ13239_OA.pdf |
Idioma(s) |
eng |
Publicador |
A I P Publishing LLC |
Palavras-Chave | #Acoustic noise #Computer simulation #Electrodes #Implants (surgical) #Patient treatment #320705 Sensory Systems #321025 Rehabilitation and Therapy - Hearing and Speech #380302 Linguistic Processes (incl. Speech Production and Comprehension) |
Tipo |
Journal Article |