Temporal cues for consonant recognition: Training, talker generalization, and use in evaluation of cochlear implants

1992 ◽  
Vol 92 (3) ◽  
pp. 1247-1257 ◽  
Author(s):  
Dianne J. Van Tasell ◽  
Donna G. Greenfield ◽  
Joelle J. Logemann ◽  
David A. Nelson
Keyword(s):  
Cochlear Implants ◽  
Temporal Cues ◽  
Consonant Recognition

scholarly journals An Attempt to Improve Bilateral Cochlear Implants by Increasing the Distance between Electrodes and Providing Complementary Information to the Two Ears

2010 ◽  
Vol 21 (01) ◽  
pp. 052-065 ◽  
Author(s):  
Richard S. Tyler ◽  
Shelley A. Witt ◽  
Camille C. Dunn ◽  
Ann Perreau ◽  
Aaron J. Parkinson ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Cochlear Implants ◽  
Speech Processing ◽  
Processing Strategy ◽  
Bilateral Cochlear Implants ◽  
Channel Interaction ◽  
Consonant Recognition ◽  
Bilateral Cochlear Implant ◽  
Input Spectrum

Objectives: The purpose of this investigation was to determine if adult bilateral cochlear implant recipients could benefit from using a speech processing strategy in which the input spectrum was interleaved among electrodes across the two implants. Design: Two separate experiments were conducted. In both experiments, subjects were tested using a control speech processing strategy and a strategy in which the full input spectrum was filtered so that only the output of half of the filters was audible to one implant, while the output of the alternative filters was audible to the other implant. The filters were interleaved in a way that created alternate frequency “holes” between the two cochlear implants. Results: In experiment one, four subjects were tested on consonant recognition. Results indicated that one of the four subjects performed better with the interleaved strategy, one subject received a binaural advantage with the interleaved strategy that they did not receive with the control strategy, and two subjects showed no decrement in performance when using the interleaved strategy. In the second experiment, 11 subjects were tested on word recognition, sentences in noise, and localization (it should be noted that not all subjects participated in all tests). Results showed that for speech perception testing one subject achieved significantly better scores with the interleaved strategy on all tests, and seven subjects showed a significant improvement with the interleaved strategy on at least one test. Only one subject showed a decrement in performance on all speech perception tests with the interleaved strategy. Out of nine subjects, one subject preferred the sound quality of the interleaved strategy. No one performed better on localization with the interleaved strategy. Conclusion: Data from this study indicate that some adult bilateral cochlear implant recipients can benefit from using a speech processing strategy in which the input spectrum is interleaved among electrodes across the two implants. It is possible that the subjects in this study who showed a significant improvement with the interleaved strategy did so because of less channel interaction; however, this hypothesis was not directly tested.

scholarly journals Pitch contour identification with combined place and temporal cues using cochlear implants

2012 ◽  
Vol 131 (2) ◽  
pp. 1325-1336 ◽  
Author(s):  
Xin Luo ◽  
Monica Padilla ◽  
David M. Landsberger
Keyword(s):  
Cochlear Implants ◽  
Pitch Contour ◽  
Temporal Cues

Lexical tone identification and consonant recognition in acoustic simulations of cochlear implants

2009 ◽  
Vol 129 (6) ◽  
pp. 630-637 ◽  
Author(s):  
Yung-Song Lin ◽  
Huei-Ping Lu ◽  
Su-Chen Hung ◽  
Chung-Ping Chang
Keyword(s):  
Cochlear Implants ◽  
Lexical Tone ◽  
Consonant Recognition

Phoneme Recognition and Confusions With Multichannel Cochlear Implants

2002 ◽  
Vol 45 (5) ◽  
pp. 1055-1069 ◽  
Author(s):  
Taina T. Välimaa ◽  
Taisto K. Määttä ◽  
Heikki J. Löppönen ◽  
Martti J. Sorri
Keyword(s):  
Cochlear Implants ◽  
Repeated Measure ◽  
Repeated Measure Design ◽  
Phoneme Recognition ◽  
Place Of Articulation ◽  
Open Set ◽  
Consonant Recognition ◽  
Measure Design ◽  
The Mean ◽  
Manner Of Articulation

The aim of this study was to investigate how postlingually severely or profoundly hearing-impaired adults relearn to recognize consonants after receiving multichannel cochlear implants. Consonant recognition of 19 Finnish-speaking subjects was studied for a minimum of 6 months and a maximum of 24 months using an open-set nonsense-syllable test in a prospective repeated-measure design. Responses were coded for phoneme errors, and proportions of correct responses and 95% confidence intervals were calculated for recognition and confusions. Two years after the switch-on, the mean recognition of consonants was 71% (95% confidence interval = 68–73%). The manner of articulation was easier to classify than the place of articulation, and the consonants [s], [r], [k], [t], [p], [n], and [j] were easier to recognize than [h], [m], [l], and [υ]. Adaptation to electrical hearing with a multichannel cochlear implant was successful, but consonants with alveolar, palatal, or velar transitions (high F2) were better recognized than consonants with labial transitions (low F2). The locus of the F2 transitions of the consonants with better recognition was at the frequencies 1.5–2 kHz, whereas the locus of the F2 transitions of the consonants with poorer recognition was at 1.2–1.4 kHz. A tendency to confuse consonants with the closest consonant with higher F2 transition was also noted.

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