Speech perception with the Vienna extra-cochlear single-channel implant: a comparison of two approaches to speech coding

British Journal of Audiology
S Rosen, V Ball

Abstract

Although it is generally accepted that single-channel electrical stimulation can significantly improve a deafened patient's speech perceptual ability, there is still much controversy surrounding the choice of speech processing schemes. We have compared, in the same patients, two different approaches: (1) The speech pattern extraction technique of the EPI group, London (Fourcin et al., British Journal of Audiology, 1979,13,85-107) in which voice fundamental frequency is extracted and presented in an appropriate way, and (2) The analogue 'whole speech' approach of Hochmair and Hochmair-Desoyer (Annals of the New York Academy of Sciences, 1983, 405, 268-279) of Vienna, in which the microphone-sensed acoustic signal is frequency-equalized and amplitude-compressed before being presented to the electrode. With the 'whole-speech' coding scheme (which they used daily), all three patients showed an improvement in lipreading when they used the device. No patient was able to understand speech without lipreading. Reasonable ability to distinguish voicing contrasts and voice pitch contours was displayed. One patient was able to detect and make appropriate use of the presence of voiceless frication in certain situations. Little sensitivity t...Continue Reading

References

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Citations

Mar 12, 2009·The Journal of the Acoustical Society of America·Christopher A Brown, Sid P Bacon
Feb 1, 1986·British Journal of Audiology·T Waters
Jun 8, 2007·The Journal of the Acoustical Society of America·Ying-Yee Kong, Robert P Carlyon
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Jun 29, 1992·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·S Rosen
Jan 1, 1990·Acta Oto-laryngologica·Arne RisbergGöran Bredberg
Jan 1, 1988·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·B J GantzR S Tyler

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