212:. More specifically, using noiseband vocoding, inherent degradations of cochlear-implant speech signal transmission were (loosely) mimicked by removing most temporal fine structure and limiting envelope information to a small number of spectral channels. This paper showed both the importance of envelop information for speech perception, as well as providing an initial explanation why, in quiet listening environments, cochlear-implant users can perceive speech well, despite those degradations. In a later study, Shannon and colleagues provided early evidence that one of the main limiting factors in speech perception by cochlear-implant users is reduced spectral resolution. What this paper showed was that the limitation in spectral resolution was not caused by the limited number of electrodes, which each delivers distinct spectral information of speech. Instead, it seemed to be caused by an internal factor, namely, channel interactions, a consequence of direct electric stimulation of the auditory nerve.
165:(TNO; English: Netherlands Organisation for Applied Scientific Research), Soesterberg, Netherlands, and University of California, Irvine, CA, USA. After faculty positions at University of California, San Francisco, CA, USA, and Boys Town National Research Hospital (BTNRH), he served as the director of Department of Auditory Implant and Perception Research,
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A key early contribution was the development of a research interface that could be used by researchers to independently achieve stimulus control in electric stimulation (now referred to as direct stimulation). In 1995, Shannon and colleagues published a study on perception of speech that was
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Shannon has supervised a number of PhD students and postdocs, whose projects lead to a comprehensive exploration of the effects of front-end processing and related parameters of cochlear-implant signal processing and electrode placement on sound and speech perception.
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Shannon has been one of the earlier and main researchers studying the psychophysics of electrical stimulation in cochlear-implant users, laying out the foundations for fundamental limitations and capabilities of sound perception with a
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Friesen, Lendra M.; Shannon, Robert V.; Baskent, Deniz; Wang, Xiaosong (August 2001). "Speech recognition in noise as a function of the number of spectral channels: Comparison of acoustic hearing and cochlear implants".
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Shannon, Robert V.; Adams, Doug D.; Ferrel, Roger L.; Palumbo, Robert L.; Grandgenett, Michael (February 1990). "A computer interface for psychophysical and speech research with the
Nucleus cochlear implant".
162:
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Fu, Qian-Jie; Shannon, Robert V.; Wang, Xiaosong (December 1998). "Effects of noise and spectral resolution on vowel and consonant recognition: Acoustic and electric hearing".
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Fu, Qian-Jie; Shannon, Robert V. (November 1998). "Effects of amplitude nonlinearity on phoneme recognition by cochlear implant users and normal-hearing listeners".
835:
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Fu, Qian-Jie; Shannon, Robert V. (January 2000). "Effect of stimulation rate on phoneme recognition by
Nucleus-22 cochlear implant listeners".
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As of 2018, Shannon is serving as a Member of
Hearing4All Scientific Advisory Board, and Board of Directors of Hearing Health Foundation.
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Shannon has been a founding organizer of
Conference on Implantable Auditory Prostheses (CIAP). In 1996, Shannon was elected Fellow of the
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Shannon, R. V.; Zeng, F.-G.; Kamath, V.; Wygonski, J.; Ekelid, M. (October 1995). "Speech
Recognition with Primarily Temporal Cues".
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Chatterjee, Monita; Shannon, Robert V. (May 1998). "Forward masked excitation patterns in multielectrode electrical stimulation".
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Başkent, Deniz; Shannon, Robert V. (November 2004). "Frequency-place compression and expansion in cochlear implant listeners".
133:
is
Research Professor of Otolaryngology-Head & Neck Surgery and Affiliated Research Professor of Biomedical Engineering at
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Shannon, Robert V. (August 1983). "Multichannel electrical stimulation of the auditory nerve in man. I. Basic psychophysics".
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180:"for contributions in the psychoelectric study of hearing." In 2007, Shannon served as the President of
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137:, CA, USA. Shannon investigates the basic mechanisms underlying auditory neural processing by users of
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169:, Los Angeles, CA, USA, with an affiliated research professor position at Biomedical Engineering,
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Srinivasan, Arthi G.; Padilla, Monica; Shannon, Robert V.; Landsberger, David M. (May 2013).
739:"Interactions between cochlear implant electrode insertion depth and frequency-place mapping"
439:"Multichannel electrical stimulation of the auditory nerve in man. II. Channel interaction"
161:, San Diego, CA, USA, in 1975, he completed two postdocs, one at Institute for Perception,
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Shannon received his B.A. degrees in
Mathematics and Psychology from the
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Nederlandse
Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek
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200:. Later, Shannon has expanded his research to also include
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737:Başkent, Deniz; Shannon, Robert V. (March 2005).
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712:The Journal of the Acoustical Society of America
677:The Journal of the Acoustical Society of America
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285:The Journal of the Acoustical Society of America
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42:University of California, San Diego
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204:and auditory midbrain implants.
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782:: 29–36.
149:Biography
44:, CA, USA
37:Education
806:23467170
581:11519582
191:Research
32:American
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