Performance of Some of the Better Cochlear-Implant Patients

1989 ◽  
Vol 32 (4) ◽  
pp. 887-911 ◽  
Author(s):  
Richard S. Tyler ◽  
Brian C. J. Moore ◽  
Francis K. Kuk
Keyword(s):  
Word Recognition ◽  
Cochlear Implant ◽  
Scaling Analysis ◽  
Gap Detection ◽  
Environmental Sound ◽  
Sound Perception ◽  
Detection Thresholds ◽  
Closed Set ◽  
Open Set ◽  
Wide Range

The main purpose of this study was to provide an independent corroboration of open-set word recognition in some of the better cochlear-implant patients. These included the Chorimac, Nucleus (one group from the U.S.A. and one group from Hannover, Germany), Symbion, Duren/Cologne and 3M/Vienna implants. Three experiments are reported: (1) word recognition in word lists and in sentences; (2) environmental sound perception, and (3) gap detection. On word recognition, the scores of 6 Chorimac patients averaged 2.5% words and 0.7% words in sentences correct in the French tests. In the German tests, the scores averaged 17% words and 10% words in sentences for 10 Duren/Cologne patients, 15% words and 16% words in sentences for 9 3M/Vienna patients, and 10% words and 16% words in sentences (3% to 26%) for 10 Nucleus/Hannover patients. In the English tests, the scores averaged 11% words and 29.6% words in sentences for l0 Nucleus-U.S.A. patients, and 13.7% words and 35.7% words in sentences for the 9 Symbion patients. The ability to recognize recorded environmental sounds was measured with a closed set of 18 sounds. Performance averaged 23% correct for Chorimac patients, 41% correct for 3M/Vienna patients, 44% correct for Nucleus/Hannover patients, 21% correct for Duren/Cologne patients, 58% correct for Nucleus/U.S.A. patients, and 83% correct for Symbion patients. A multidimensional scaling analysis suggested that patients were, in part, utilizing information about the envelope and about the periodic/aperiodic nature of some of the sounds. Gap detection thresholds with a one-octave wide noise centered at 500 Hz varied widely among patients. Typically, patients with gap thresholds less than 40 ms showed a wide range of performance on speech perception tasks, whereas patients with gap-detection thresholds greater than 40 ms showed poor word recognition skills.

Modeling closed‐set phoneme and open‐set word recognition by multi‐channel cochlear implant users

1999 ◽  
Vol 106 (4) ◽  
pp. 2177-2177 ◽  
Author(s):  
Ted A. Meyer ◽  
Mario A. Svirsky ◽  
Stefan Frisch ◽  
Adam R. Kaiser ◽  
David B. Pisoni ◽  
...  
Keyword(s):  
Word Recognition ◽  
Cochlear Implant ◽  
Closed Set ◽  
Open Set

Performance Over Time of Congenitally Deaf and Postlingually Deafened Children Using a Multichannel Cochlear Implant

1992 ◽  
Vol 35 (4) ◽  
pp. 913-920 ◽  
Author(s):  
Holly Fryauf-Bertschy ◽  
Richard S. Tyler ◽  
Danielle M. Kelsay ◽  
Bruce J. Gantz
Keyword(s):  
Speech Perception ◽  
Word Recognition ◽  
Cochlear Implant ◽  
Deaf Children ◽  
Closed Set ◽  
Open Set ◽  
Northwestern University ◽  
Identification Test ◽  
Improved Performance ◽  
Over Time

The speech perception performance of 10 congenitally deaf and 3 postlingually deafened children who received the Cochlear Corporation multichannel cochlear implant was examined and compared. The children were tested preimplant and at 6-month intervals up to 2 years using the Monosyllable-Trochee-Spondee test (MTS), the Word Intelligibility by Picture Identification test (WIPI), and Phonetically Balanced Kindergarten (PB-K) or Northwestern University List 6 (NU-6) word lists. The postlingually deafened children exhibited significantly improved performance on open- and closed-set tests of word recognition after 6 months of implant use, a pattern similar to that of postlingually deafened adult implant users. In contrast, the congenitally deaf children did not exhibit measurably improved performance on speech perception tests until after 12 months or more of implant use. With as much as 18–24 months of use, however, some congenitally deaf children demonstrated limited open-set word recognition.

scholarly journals Environmental Sound Training in Cochlear Implant Users

2015 ◽  
Vol 58 (2) ◽  
pp. 509-519 ◽  
Author(s):  
Valeriy Shafiro ◽  
Stanley Sheft ◽  
Sejal Kuvadia ◽  
Brian Gygi
Keyword(s):  
Cochlear Implant ◽  
Low Cost ◽  
Computer Training ◽  
Environmental Sound ◽  
Sound Perception ◽  
Environmental Sounds ◽  
Computer Based Training ◽  
Home Based ◽  
Average Improvement ◽  
Computer Based

Purpose The study investigated the effect of a short computer-based environmental sound training regimen on the perception of environmental sounds and speech in experienced cochlear implant (CI) patients. Method Fourteen CI patients with the average of 5 years of CI experience participated. The protocol consisted of 2 pretests, 1 week apart, followed by 4 environmental sound training sessions conducted on separate days in 1 week, and concluded with 2 posttest sessions, separated by another week without training. Each testing session included an environmental sound test, which consisted of 40 familiar everyday sounds, each represented by 4 different tokens, as well as the Consonant Nucleus Consonant (CNC) word test, and Revised Speech Perception in Noise (SPIN-R) sentence test. Results Environmental sounds scores were lower than for either of the speech tests. Following training, there was a significant average improvement of 15.8 points in environmental sound perception, which persisted 1 week later after training was discontinued. No significant improvements were observed for either speech test. Conclusions The findings demonstrate that environmental sound perception, which remains problematic even for experienced CI patients, can be improved with a home-based computer training regimen. Such computer-based training may thus provide an effective low-cost approach to rehabilitation for CI users, and potentially, other hearing impaired populations.

Speech Perception Performance in Experienced Cochlear-Implant Patients Receiving the SPEAK Processing Strategy in the Nucleus Spectra-22 Cochlear Implant

1998 ◽  
Vol 41 (5) ◽  
pp. 1073-1087 ◽  
Author(s):  
Aaron J. Parkinson ◽  
Wendy S. Parkinson ◽  
Richard S. Tyler ◽  
Mary W. Lowder ◽  
Bruce J. Gantz
Keyword(s):  
Speech Recognition ◽  
Speech Perception ◽  
Cochlear Implant ◽  
Sound Quality ◽  
Learning Effects ◽  
Processing Strategy ◽  
Subjective Ratings ◽  
Open Set ◽  
Wide Range

Sixteen experienced cochlear implant patients with a wide range of speechperception abilities received the SPEAK processing strategy in the Nucleus Spectra-22 cochlear implant. Speech perception was assessed in quiet and in noise with SPEAK and with the patients' previous strategies (for most, Multipeak) at the study onset, as well as after using SPEAK for 6 months. Comparisons were made within and across the two test sessions to elucidate possible learning effects. Patients were also asked to rate the strategies on seven speech recognition and sound quality scales. After 6 months' experience with SPEAK, patients showed significantly improved mean performance on a range of speech recognition measures in quiet and noise. When mean subjective ratings were compared over time there were no significant differences noted between strategies. However, many individuals rated the SPEAK strategy better for two or more of the seven subjective measures. Ratings for "appreciation of music" and "quality of my own voice" in particular were generally higher for SPEAK. Improvements were realized by patients with a wide range of speech perception abilities, including those with little or no open-set speech recognition.

A Picture Identification Task as an Estimate of the Word-Recognition Performance of Nonverbal Adults

1980 ◽  
Vol 45 (2) ◽  
pp. 223-238 ◽  
Author(s):  
Richard H. Wilson ◽  
June K. Antablin
Keyword(s):  
Word Recognition ◽  
Recognition Performance ◽  
Test Word ◽  
Stimulus Presentation ◽  
Identification Task ◽  
Closed Set ◽  
Open Set ◽  
Northwestern University ◽  
Monosyllabic Words ◽  
Picture Identification

The Picture Identification Task was developed to estimate the word-recognition performance of nonverbal adults. Four lists of 50 monosyllabic words each were assembled and recorded. Each test word and three rhyming alternatives were illustrated and photographed in a quadrant arrangement. The task of the patient was to point to the picture representing the recorded word that was presented through the earphone. In the first experiment with young adults, no significant differences were found between the Picture Identification Task and the Northwestern University Auditory Test No. 6 materials in an open-set response paradigm. In the second experiment, the Picture Identification Task with the picture-pointing response was compared with the Northwestern University Auditory Test No. 6 in both an open-set and a closed-set response paradigm. The results from this experiment demonstrated significant differences among the three response tasks. The easiest task was a closed-set response to words, the next was a closed-set response to pictures, and the most difficult task was an open-set response. At high stimulus-presentation levels, however, the three tasks produced similar results. Finally, the clinical use of the Picture Identification Task is described along with preliminary results obtained from 30 patients with various communicative impairments.

scholarly journals An introductory overview of bimodal fitting

2021 ◽  
Author(s):  
Mahdieh Hasanalifard ◽  
Younes Lotfi ◽  
Abdollah Moossavi
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implants ◽  
Hearing Aid ◽  
Binaural Hearing ◽  
Residual Hearing ◽  
Sound Perception ◽  
Speech Perception In Noise ◽  
Musical Perception ◽  
Introductory Overview ◽  
Wide Range

Background and Aim: In a bimodal fitting, one ear is stimulated acoustically with a hearing aid and the other is stimulated electrically with a cochlear implant. This paper provides a brief summary of the concept of bimodal fitting, binaural hearing and its importance, the hearing benefits of binaural hearing in bimodal fitting, candidacy and hearing aid adjustment in bimodal fitting cases. Recent Findings: Researches have shown that bimodal fitting offers a wide range of hearing benefits over unilateral cochlear implants, such as better speech perception in noise, better musical perception, and a better understanding of pitch and tone perception and naturalness of sound perception. Conclusion: Considering the binaural hearing advantages in bimodal fitting users, it can be concluded that users of unilateral cochlear implants who have measurable residual hearing in their non-implanted ear can use a hearing aid in that ear and enjoy binaural hearing advantages. The hearing aid should be fitted in a way to complement the information obtained through cochlear implantation. Keywords: Bimodal fitting; cochlear implant; binaural hearing

scholarly journals Effect of stimulus polarity on detection thresholds in cochlear implant users: relationships with average threshold, gap detection, and rate discrimination

2018 ◽  
Author(s):  
Robert P. Carlyon ◽  
Stefano Cosentino ◽  
John M. Deeks ◽  
Wendy Parkinson ◽  
Julie A. Arenberg
Keyword(s):  
Cochlear Implant ◽  
High Amplitude ◽  
Gap Detection ◽  
Detection Thresholds ◽  
Polarity Effect ◽  
Modelling Studies ◽  
Neural Survival ◽  
Rate Discrimination ◽  
Central High ◽  
Anodic Stimulation

AbstractPrevious psychophysical and modelling studies suggest that cathodic stimulation by a cochlear implant (CI) may preferentially activate the peripheral processes of the auditory nerve, whereas anodic stimulation may preferentially activate the central axons. Because neural degeneration typically starts with loss of the peripheral processes, lower thresholds for cathodic than for anodic stimulation may indicate good local neural survival. We measured thresholds for 99-pulse-per-second trains of triphasic (TP) pulses where the central high-amplitude phase was either anodic (TP-A) or cathodic (TP-C). Thresholds were obtained in monopolar mode from four or five electrodes and a total of eight ears from subjects implanted with the Advanced Bionics CI. When between–subject differences were removed, there was a modest but significant correlation between the polarity effect (TP-C threshold minus TP-A threshold) and the average of TP-C and TP-A thresholds, consistent with the hypothesis that a large polarity effect corresponds to good neural survival. When data were averaged across electrodes for each subject, relatively low thresholds for TP-C correlated with a high “upper limit” (the pulse rate up to which pitch continues to increase) from a previous study [Cosentino S, Carlyon RP, Deeks JM, Parkinson W, Bierer JA (2016) Rate discrimination, gap detection and ranking of temporal pitch in cochlear implant users. J Assoc Otolaryngol 17:371– 382]. Overall the results provide modest indirect support for the hypothesis that the polarity effect provides an estimate of local neural survival.

Initial Iowa Results with the Multichannel Cochlear Implant from Melbourne

1984 ◽  
Vol 27 (4) ◽  
pp. 596-604 ◽  
Author(s):  
Richard S. Tyler ◽  
Mary W. Lowder ◽  
Steven R. Otto ◽  
John P. Preece ◽  
Bruce J. Gantz ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Contextual Information ◽  
Correct Recognition ◽  
Open Set Condition ◽  
Closed Set ◽  
Open Set ◽  
Implant Tests ◽  
Vowel Recognition ◽  
First 90 Days ◽  
Speech Tracking

Two subjects who use the Melbourne multichannel cochlear implant were studied. Live-voice word, consonant, and vowel recognition tests, and a speech-tracking task were administered at regular intervals during the first 90 days after implantation. Results indicated 30-50% correct recognition of vowels (given 9 alternatives) and about 30-60% correct recognition of consonants (given 12 alternatives). Speech tracking showed from two to three times faster rates with the implant and vision compared to a vision-alone condition. After 3-4 months of implant experience, a number of recorded tests from the Minimal Auditory Capabilities battery and the Iowa Cochlear-Implant tests were then administered. These results indicated about 80% recognition of everyday sounds in a five-choice closed-set condition and about 50% recognition of everyday sounds in an open-set condition. The subjects were 50% correct at identifying the accented words in a sentence and about 50% correct at determining the number of syllables in a word. One subject was unable to recognize a sentence as a statement or a question. Background noise (+10 dB S/N) reduced their performance on a four-choice spondee test to chance. Both subjects were able to identify a sound as either a voice or a modulated noise at 95% correct, and both could recognize speaker sex at 95% correct. Neither could discriminate whether two (successive) sentences were spoken by the same speaker or by two different speakers. Remarkably, one subject identified 45% and the other 85% of the words in sentences that were preceded by a contextual picture using sound alone. One subject identified 13% of the words in sentences in sound alone even without contextual information.

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