Speech-Tracking Performance in Single-Channel Cochlear Implant Subjects

1985 ◽  
Vol 28 (4) ◽  
pp. 565-578 ◽  
Author(s):  
Amy McConkey Robbins ◽  
Mary Joe Osberger ◽  
Richard T. Miyamoto ◽  
Marjorie L. Kienle ◽  
Wendy A. Myres
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implant ◽  
Learning Effect ◽  
Single Channel ◽  
Connected Discourse ◽  
Deaf Adults ◽  
Relative Gains ◽  
Subject Differences ◽  
Over Time ◽  
Speech Tracking

This study evaluated 20 deaf adults' ability to understand connected discourse under two conditions: (a) lipreading alone (LA), and (b) lipreading plus electrical stimulation by a single-channel cochlear implant (LI). Performance was evaluated using the speech-tracking procedure, which required the deaf receiver to repeat verbatim textual material read by another individual. The reception of ongoing speech was measured in terms of the number of words repeated correctly per minute. The results revealed, on the average, a significantly higher tracking rate in the LI condition (28.6 wpm) than the LA condition (16.4 wpm). There was a significant learning effect across sessions for both conditions. Subjects who were previous hearing aid users achieved a significantly higher tracking rate in the LI condition than did subjects who had no previous experience with amplification. Significant subject differences were present as a function of condition. Sixteen of the 20 subjects achieved higher tracking rates in the LI than in the LA condition. However, 4 of these 16 subjects showed similar relative gains in both conditions and 3 showed a decrease in performance in the LA condition over time. The remaining 4 subjects showed nearly equivalent tracking rates in both conditions over time. The data suggest that the majority of subjects were able to learn to make use of the cues provided by electrical stimulation by a single-channel cochlear implant to enhance their lipreading skills, at least for highly redundant material in a communicative situation.

Speech Perception by Four Single-Channel Cochlear Implant Users

1987 ◽  
Vol 30 (4) ◽  
pp. 480-493 ◽  
Author(s):  
Laurel J. Dent ◽  
F. Blair Simmons ◽  
Robert L. White ◽  
Robert A. Roberts
Keyword(s):  
Single Channel ◽  
Daily Basis ◽  
Visual Speech ◽  
Speech Comprehension ◽  
Frequent Users ◽  
Connected Discourse ◽  
Listening Tests ◽  
Significant Difference ◽  
Deaf Adults ◽  
Sound Processor

Four profoundly deaf adults, each a recent recipient of a scala tympani implant, underwent auditory and auditory-visual speech comprehension evaluations. Two subjects had multiple-electrode auditory prostheses, and 2 had single-electrode implants. All subjects were tested preoperatively with a high-power hearing aid, and postoperatively with a single-channel wearable sound processor. Reported here are the results of the first formal speech recognition tests which were conducted during the 8 months after the sound processor fitting. Three subjects had used the single-channel processor on a daily basis for up to 8 months at the time of postoperative testing. The 4th subject was a nonuser. On listening tests, a comparison between pre- and post-implant scores revealed little difference for any subject. On postoperative speechreading tasks, all subjects identified medial consonant phonemes and 2-digit numerals better with stimulation than without. The 3 frequent users of the device experienced significant improvement on connected-discourse tracking, and their speechreading of videotaped and live voice CID Everyday Sentences (Davis & Silverman, 1978) was enhanced with the addition of stimulation. The nonuser was a very proficient speechreader at the outset and exhibited no significant difference on connected-discourse tracking with and without stimulation. Moreover her ability to speechread Everyday Sentences was hampered slightly by the addition of stimulation. This single-channel sound processor functioned as a sensory supplement for the 3 frequent users, but no subject was able to use the processor as a sensory substitute.

Cochlear implantation in Thailand

1999 ◽  
Vol 113 (6) ◽  
pp. 515-517 ◽  
Author(s):  
Kanate Vaewvichit ◽  
Parinya Luangpitakchumpol
Keyword(s):  
Speech Recognition ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Single Channel ◽  
Deaf Children ◽  
Operative Results ◽  
Speech Rehabilitation ◽  
Lip Reading ◽  
Deaf Adults ◽  
Contralateral Ear

AbstractThis article evaluates and compares the benefits of a House/3M single channel cochlear implant or a Nucleus 22-channel cochlear implant on speech recognition in Thai-speaking patients. From 1986–1989, four profoundly deaf adults were implanted with the House/3M prosthesis. Since 1994, nine post-lingually deaf adults and three pre-lingually deaf children have been implanted with the Nucleus prosthesis. One case was implanted with the House/3M prosthesis and in the contralateral ear with the Nucleus prosthesis. The post-operative results were determined according to the ability to understand Thai monosyllabic, bisyllabic open-word sets and everyday sentence tests with, and without, lip reading. The scores were then compared in the House/3M users and the Nucleus users and compared between the House/3M cochlear implant and the Nucleus cochlear implant in the same user. The speech recognition scores on monosyllabic and bisyllabic open-word set demonstrated that the Nucleus users perform at a much higher level than the House/3M users. The results of four pre-lingually deaf children will be reported later after a period of auditory and speech rehabilitation.

Effect of Speech Processor Program Modifications on Cochlear Implant Recipients’ Threshold and Maximum Acceptable Loudness Levels

1999 ◽  
Vol 8 (2) ◽  
pp. 128-136 ◽  
Author(s):  
John C. Sun ◽  
Margarate W. Skinner ◽  
S. Y. Liu ◽  
T. S. Huang
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implant ◽  
Everyday Life ◽  
Dynamic Range ◽  
Active Electrode ◽  
Speech Processor ◽  
Significant Change ◽  
Upper Boundary

This study’s purpose was to determine whether or not modifications in speech processor electrical stimulation levels were associated with changes in five Nucleus 22 cochlear implant recipients’ thresholds or maximum acceptable loudness levels (MALs). These modifications in minimum and maximum stimulation levels were made to optimize hearing in everyday life. One threshold and one MAL were obtained on each active electrode during six, weekly test sessions, three before and three after program modification. Only one participant had a significant change in threshold after program modification; this participant and four others had significant changes in MAL. Participants’ threshold variability was the same, but MAL variability was higher than that observed in other studies. Because these participants had no experience making MAL judgments prior to this study, this result suggests that implant recipients should be given sufficient practice in making MAL judgments to provide a stable clinical estimate of the upper boundary of the electrical dynamic range.

scholarly journals Cochlear implantation: a review of the literature and the Nijmegen results

1997 ◽  
Vol 111 (11) ◽  
pp. 1008-1017 ◽  
Author(s):  
Mohammad Jamal A. Makhdoum ◽  
Ad F. M. Snik ◽  
Paul van den Broek
Keyword(s):  
Cochlear Implant ◽  
Hearing Aids ◽  
Cochlear Implantation ◽  
Sensorineural Deafness ◽  
Deaf Children ◽  
Subject Selection ◽  
Profound Deafness ◽  
Deaf Adults ◽  
Adults And Children ◽  
To Receive

AbstractThe field of cochlear implantation is developing rapidly. In subjects with bilateral profound deafness who gain no benefit from conventional hearing aids the aim of cochlear implantation is to provide a means for them to receive auditory sensations. Throughout the world, most cochlear implant centres are still continuing their research efforts to improve the results with this technique. Although it is still difficult to predict how an individual will perform with a cochlear implant, the success of cochlear implantation can no longer be denied. In this paper, we review some recent papers and reports, and the results of the various Nijmegen cochlear implant studies. Data about subject selection, examinations, surgery and the outcome are discussed. Our results were in good agreement with those of other authors. It can be concluded once again that cochlear implantation is an effective treatment for postlingually deaf adults and children, and for prelingually (congenital or acquired) deaf children with profound bilateral sensorineural deafness.

Electrically Evoked Brainstem Responses in Cochlear Implant Recipients

1987 ◽  
Vol 96 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Richard T. Miyamoto ◽  
D. Douglas Brown
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implant ◽  
Auditory Nerve ◽  
Clinical Applications ◽  
Assessment Tools ◽  
Laboratory Setting ◽  
Recording Technique ◽  
Stimulus Artifact ◽  
Artifact Suppression ◽  
Stimulation Of

Electrical stimulation of the auditory nerve in the profoundly deaf population through implanted cochlear prostheses has increased the need for reliable electrophysiologic assessment tools. We have recorded electrically evoked brainstem responses (EABRs) in 21 subjects who have received a 3M/House cochlear implant. Recordings have been made, both intraoperatively and postoperatively, in the laboratory setting. The recording technique, methods of stimulus artifact suppression, and results of our measurements are described. Clinical applications of this technology are suggested.

scholarly journals Systematic Review of Auditory Training in Pediatric Cochlear Implant Recipients

2019 ◽  
Vol 62 (5) ◽  
pp. 1574-1593 ◽  
Author(s):  
Hanin Rayes ◽  
Ghada Al-Malky ◽  
Deborah Vickers
Keyword(s):  
Quality Of Life ◽  
Systematic Review ◽  
Cochlear Implant ◽  
Auditory Training ◽  
Memory Retention ◽  
Speech Discrimination ◽  
Speech And Language Development ◽  
Published Research ◽  
Over Time

Objective The purpose of this systematic review is to evaluate the published research in auditory training (AT) for pediatric cochlear implant (CI) recipients. This review investigates whether AT in children with CIs leads to improvements in speech and language development, cognition, and/or quality of life and whether improvements, if any, remain over time post AT intervention. Method A systematic search of 7 databases identified 96 review articles published up until January 2017, 9 of which met the inclusion criteria. Data were extracted and independently assessed for risk of bias and quality of study against a PICOS (participants, intervention, control, outcomes, and study) framework. Results All studies reported improvements in trained AT tasks, including speech discrimination/identification and working memory. Retention of improvements over time was found whenever it was assessed. Transfer of learning was measured in 4 of 6 studies, which assessed generalization. Quality of life was not assessed. Overall, evidence for the included studies was deemed to be of low quality. Conclusion Benefits of AT were illustrated through the improvement in trained tasks, and this was observed in all reviewed studies. Transfer of improvement to other domains and also retention of benefits post AT were evident when assessed, although rarely done. However, higher quality evidence to further examine outcomes of AT in pediatric CI recipients is needed.

scholarly journals Speech intelligibility enhancement for Thai-speaking cochlear implant listeners

2019 ◽  
Vol 13 (3) ◽  
pp. 866
Author(s):  
Siriporn Dachasilaruk ◽  
Niphat Jantharamin ◽  
Apichai Rungruang
Keyword(s):  
Cochlear Implant ◽  
Speech Enhancement ◽  
Speech Intelligibility ◽  
English Language ◽  
Single Channel ◽  
Spectral Subtraction ◽  
Monosyllabic Words ◽  
Listening Environments ◽  
Babble Noise ◽  
Vocoded Speech

Cochlear implant (CI) listeners encounter difficulties in communicating with other persons in noisy listening environments. However, most CI research has been carried out using the English language. In this study, single-channel speech enhancement (SE) strategies as a pre-processing approach for the CI system were investigated in terms of Thai speech intelligibility improvement. Two SE algorithms, namely multi-band spectral subtraction (MBSS) and Weiner filter (WF) algorithms, were evaluated. Speech signals consisting of monosyllabic and bisyllabic Thai words were degraded by speech-shaped noise and babble noise at SNR levels of 0, 5, and 10 dB. Then the noisy words were enhanced using SE algorithms. The enhanced words were fed into the CI system to synthesize vocoded speech. The vocoded speech was presented to twenty normal-hearing listeners. The results indicated that speech intelligibility was marginally improved by the MBSS algorithm and significantly improved by the WF algorithm in some conditions. The enhanced bisyllabic words showed a noticeably higher intelligibility improvement than the enhanced monosyllabic words in all conditions, particularly in speech-shaped noise. Such outcomes may be beneficial to Thai-speaking CI listeners.

Exploring Technology Evolution Using Patent Classification: A Case of Cochlear Implant Technology Patents

2017 ◽  
Vol 14 (01) ◽  
pp. 1740002 ◽  
Author(s):  
Srigowtham Arunagiri ◽  
Mary Mathew
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implants ◽  
Patent Data ◽  
Technology Evolution ◽  
Medical Products ◽  
Patent Classification ◽  
Analysis Technique ◽  
Dominant Classes ◽  
D Investment ◽  
Over Time

Understanding technology evolution through periodic landscaping is an important stage of strategic planning in R&D management. In fields like that of healthcare, where initial R&D investment is huge and good medical products serve patients better, activities of periodic landscaping become crucial for planning. Approximately 5% of the world’s population has hearing disabilities. Current hearing aid products meet less than 10% of the global needs. Patent data and classifications on cochlear implants from 1977–2010 show the technology evolution in the area of such an implant. We attempt to highlight emergence and disappearance of patent classes over a period of time indicating changes in growth of cochlear implant technologies. Using network analysis technique we explore and capture the technology evolution in patent classes by showing what emerged or disappeared over time. Dominant classes are identified. The sporadic influence of university research in cochlear implants is also discussed.

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