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Perception of polyphony with cochlear implants for 2 and 3 simultaneous pitches

(2014) OTOLOGY & NEUROTOLOGY. 35(3). p.431-436
Author
Organization
Project
EBRAMUS (Europe, Brain and Music: New perspectives for stimulating cognitive and sensory processes)
Abstract
Hypothesis: It was hypothesized that cochlear implant (CI) subjects would be able to correctly identify one, two and three simultaneous pitches through direct electrical stimulation. We further hypothesized that the location on the implant array and the fundamental frequency of the pitches would have an impact on the performance. Background: "They gave me back speech but not music." is a sentence commonly heard by CI subjects. One of the reasons is that in music, multiple streams are frequently played at the same time which is an essential feature of harmony. Current CI speech processors do not allow CI users to perceive such complex polyphonic sounds. Methods: In the present study the authors assessed the ability of CI subjects to perceive simultaneous modulation frequencies based on direct electrical stimulation. Ten CI subjects were asked to identify one, two and three simultaneous pitches applied on different electrodes using sinusoidal amplitude modulation. All stimuli were loudness balanced before the actual identification task. Results: Subjects were able to identify one, two and three simultaneous pitches. The further the distance between the two electrodes, the better was the performance in the two-pitch condition. The distance between the modulation frequencies had a significant effect on the performance in the two and three pitch condition. Conclusion: Subjects are able to identify complex polyphonic stimuli based on the number of active electrodes. The additional polyphonic rate pitch cue improves performance in some conditions.
Keywords
RECOGNITION, NOISE, SPEECH, HEARING, ELECTRICAL-STIMULATION, Rate pitch, Polyphonic pitch perception, Pitch perception, Cochlear implants

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Citation

Please use this url to cite or link to this publication:

Chicago
Penninger, Richard, Eugen Kludt, Charles J Limb, Marc Leman, Ingeborg Dhooge, and Andreas Buechner. 2014. “Perception of Polyphony with Cochlear Implants for 2 and 3 Simultaneous Pitches.” Otology & Neurotology 35 (3): 431–436.
APA
Penninger, R., Kludt, E., Limb, C. J., Leman, M., Dhooge, I., & Buechner, A. (2014). Perception of polyphony with cochlear implants for 2 and 3 simultaneous pitches. OTOLOGY & NEUROTOLOGY, 35(3), 431–436.
Vancouver
1.
Penninger R, Kludt E, Limb CJ, Leman M, Dhooge I, Buechner A. Perception of polyphony with cochlear implants for 2 and 3 simultaneous pitches. OTOLOGY & NEUROTOLOGY. 2014;35(3):431–6.
MLA
Penninger, Richard, Eugen Kludt, Charles J Limb, et al. “Perception of Polyphony with Cochlear Implants for 2 and 3 Simultaneous Pitches.” OTOLOGY & NEUROTOLOGY 35.3 (2014): 431–436. Print.
@article{4182810,
  abstract     = {Hypothesis: It was hypothesized that cochlear implant (CI) subjects would be able to correctly identify one, two and three simultaneous pitches through direct electrical stimulation. We further hypothesized that the location on the implant array and the fundamental frequency of the pitches would have an impact on the performance.
Background: {\textacutedbl}They gave me back speech but not music.{\textacutedbl} is a sentence commonly heard by CI subjects. One of the reasons is that in music, multiple streams are frequently played at the same time which is an essential feature of harmony. Current CI speech processors do not allow CI users to perceive such complex polyphonic sounds.
Methods: In the present study the authors assessed the ability of CI subjects to perceive simultaneous modulation frequencies based on direct electrical stimulation. Ten CI subjects were asked to identify one, two and three simultaneous pitches applied on different electrodes using sinusoidal amplitude modulation. All stimuli were loudness balanced before the actual identification task.
Results: Subjects were able to identify one, two and three simultaneous pitches. The further the distance between the two electrodes, the better was the performance in the two-pitch condition. The distance between the modulation frequencies had a significant effect on the performance in the two and three pitch condition.
Conclusion: Subjects are able to identify complex polyphonic stimuli based on the number of active electrodes. The additional polyphonic rate pitch cue improves performance in some conditions.},
  author       = {Penninger, Richard and Kludt, Eugen and Limb, Charles J and Leman, Marc and Dhooge, Ingeborg and Buechner, Andreas },
  issn         = {1531-7129},
  journal      = {OTOLOGY \& NEUROTOLOGY},
  keyword      = {RECOGNITION,NOISE,SPEECH,HEARING,ELECTRICAL-STIMULATION,Rate pitch,Polyphonic pitch perception,Pitch perception,Cochlear implants},
  language     = {eng},
  number       = {3},
  pages        = {431--436},
  title        = {Perception of polyphony with cochlear implants for 2 and 3 simultaneous pitches},
  url          = {http://dx.doi.org/10.1097/MAO.0000000000000255},
  volume       = {35},
  year         = {2014},
}

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