scholarly journals Comparison of sound perception using CIS and ACE sound coding strategies in cochlear implants

2021 ◽  
Vol 6 (3) ◽  
pp. 8-12
Author(s):  
Oleg V. Kolokolov ◽  
Aleksandr O. Kuznetsov ◽  
Anton S. Machalov ◽  
Alla A. Grigoreva
Keyword(s):  
Speech Recognition ◽  
Cochlear Implants ◽  
Hearing Aids ◽  
Full Range ◽  
Sound Field ◽  
Sound Perception ◽  
Sound Coding ◽  
National Medical ◽  
Coding Strategies ◽  
Digital Hearing Aid

Objectives to study the effect of ACE and CIS sound coding strategies on sound perception in patients with the cochlear implants system produced by Cochlear Limited. Material and methods. The study included 50 patients taking the rehabilitation course in the Astrakhan branch of the National Medical Research Center for Otorhinolaryngology of the Federal Medico-Biological Agency over the past 5 years (from 2014 to 2019). The group of subjects included children over 7 years old and adults, whose success in rehabilitation made it possible to perform a full range of tests. The patients underwent tonal threshold audiometry and speech audiometry in a free sound field; the results obtained were registered in special MS Excel tables and further analysed using statistical methods. Results. There were no statistically significant differences in hearing thresholds on tonal audiometry when using the coding strategies ACE and CIS, however, differences in speech perception were observed on average by 4.2%. The patients experienced in using hearing aids reported improved speech recognition, with scores varying within 5%. Conclusion. Using a higher-resolution coding strategy can significantly improve speech recognition, while lower-resolution coding is beneficial for patients with digital hearing aid experience.

Speech Recognition Experience with Multichannel Cochlear Implants

1985 ◽  
Vol 93 (5) ◽  
pp. 639-645 ◽  
Author(s):  
James L. Parkin ◽  
Donald K. Eddington ◽  
Jeffrey L. Orth ◽  
Derald E. Brackmann
Keyword(s):  
Clinical Trials ◽  
Electrical Stimulation ◽  
Speech Recognition ◽  
Cochlear Implants ◽  
Single Channel ◽  
University Of Utah ◽  
Sound Coding ◽  
Coding Strategies ◽  
The University ◽  
Sound Processor

Four patients received multichannel intracochlear implants before 1978 as part of the University of Utah program. By 1983, sound coding strategies and electronic miniaturization were developed to allow production and use of a portable sound processor/cochlear stimulator unit. Approval for expanded clinical trials has allowed Implantation of five additional patients by August 1984. Data on the earlier patients demonstrate stability of electrode thresholds and impedance, low risk of the percutaneous pedestal, and the development of speech recognition scores of greater than 60% with electrical stimulation alone and greater than 90% with electrical stimulation combined with lipreading. Data on recent recipients indicate early electrode threshold stability, lower thresholds for apical electrodes, possibility of replacing single-channel with multichannel units, and low morbidity of the implantation. Return to function in a verbally communicating environment has been achieved by one earlier patient.

Speech Perception Benefits of FM and Infrared Devices to Children With Hearing Aids in a Typical Classroom

2004 ◽  
Vol 35 (2) ◽  
pp. 169-184 ◽  
Author(s):  
Karen L. Anderson ◽  
Howard Goldstein
Keyword(s):  
Speech Recognition ◽  
Speech Perception ◽  
Hearing Aids ◽  
Hard Of Hearing ◽  
Background Noise ◽  
Sound Field ◽  
Single Subject ◽  
Alternating Treatments Design ◽  
Hearing In Noise ◽  
Field Systems

Children typically learn in classroom environments that have background noise and reverberation that interfere with accurate speech perception. Amplification technology can enhance the speech perception of students who are hard of hearing.Purpose:This study used a single-subject alternating treatments design to compare the speech recognition abilities of children who are hard of hearing when they were using hearing aids with each of three frequency modulated (FM) or infrared devices.Method:Eight 9–12-year-olds with mild to severe hearing loss repeated Hearing in Noise Test (HINT) sentence lists under controlled conditions in a typical kindergarten classroom with a background noise level of +10 dB signal-to-noise (S/N) ratio and 1.1 s reverberation time. Participants listened to HINT lists using hearing aids alone and hearing aids in combination with three types of S/N-enhancing devices that are currently used in mainstream classrooms: (a) FM systems linked to personal hearing aids, (b) infrared sound field systems with speakers placed throughout the classroom, and (c) desktop personal sound field FM systems.Results:The infrared ceiling sound field system did not provide benefit beyond that provided by hearing aids alone. Desktop and personal FM systems in combination with personal hearing aids provided substantial improvements in speech recognition.Clinical Implications:This information can assist in making S/N-enhancing device decisions for students using hearing aids. In a reverberant and noisy classroom setting, classroom sound field devices are not beneficial to speech perception for students with hearing aids, whereas either personal FM or desktop sound field systems provide listening benefits.

scholarly journals Method of selection and assessment of hearing aids efficiency based on comparative speech audiometry

2021 ◽  
Vol 6 (3) ◽  
pp. 21-24
Author(s):  
Evgeniya R. Tsygankova ◽  
Vladimir E. Gaufman ◽  
Irina E. Grebenyuk ◽  
Elena E. Saveleva ◽  
Evgenii S. Savelev
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Sensorineural Hearing Loss ◽  
Hearing Aids ◽  
Sound Field ◽  
Sensorineural Hearing ◽  
Speech Audiometry ◽  
Average Score ◽  
Control Group ◽  
Modified Method

Objectives to improve the quality of hearing aids (HA) selection for patients with sensorineural hearing loss using a comparative free sound field speech audiometry according to our modified method "Delta Test". Material and methods. The study involved 56 patients aged from 18 to 62 years with bilateral chronic sensorineural hearing loss of 2-4 degrees. The study group included 32 patients, a test for speech recognition in a free sound field (speech audiometry) was conducted using the method proposed by us. The control group consisted of 24 patients who were aided without the use of comparative speech audiometry. The "Delta Test" included the use of audio files sets containing a speech material in pure form and mixed with speech noise with different signal-to-noise ratios, supplied through a speaker system connected to a personal computer. The percentage of correctly repeated words was measured without HA and with several HA having different settings. The effectiveness of using HA was defined as the difference in the percentage of speech recognition when using HA in relation to the "ear without HA". Results. According to "The International Outcome Inventory for Hearing Aids" the average score was 4.13 0.10 in the group where the HA were selected using the "Delta Test", which is statistically significantly higher than in the control group, where the average score was 3.720.15(p 0.05). "Delta Test" allows optimally select the HA parameters. This method is easy to perform and does not require expensive equipment.

Speech Recognition Abilities of Adults Using Cochlear Implants with FM Systems

2004 ◽  
Vol 15 (10) ◽  
pp. 678-691 ◽  
Author(s):  
Erin C. Schafer ◽  
Linda M. Thibodeau
Keyword(s):  
Speech Recognition ◽  
Cochlear Implants ◽  
Sound Field ◽  
Normal Hearing ◽  
Classroom Setting ◽  
Percent Correct ◽  
Word Repetition ◽  
Hearing In Noise ◽  
Noise Test ◽  
Speech Recognition In Noise

Speech recognition was evaluated for ten adults with normal hearing and eight adults with Nucleus cochlear implants (CIs) at several different signal-to-noise ratios (SNRs) and with three frequency modulated (FM) system arrangements: desktop, body worn, and miniature direct connect. Participants were asked to repeat Hearing in Noise Test (HINT) sentences presented with speech noise in a classroom setting and percent correct word repetition was determined. Performance was evaluated for both normal-hearing and CI participants with the desktop soundfield system. In addition, speech recognition for the CI participants was evaluated using two FM systems electrically coupled to their speech processors. When comparing the desktop sound field and the No-FM condition, only the listeners with normal hearing made significant improvements in speech recognition in noise. When comparing the performance across the three FM conditions for the CI listeners, the two electrically coupled FM systems resulted in significantly greater improvements in speech recognition in noise relative to the desktop soundfield system.

scholarly journals Balancing the Loudness in Speech Processors and Contralateral Hearing Aids in Users of Unilateral Cochlear Implants

2020 ◽  
Author(s):  
Ana Tereza Matos Magalhães ◽  
Amanda Carvalho ◽  
Robinson Koji Tsuji ◽  
Ricardo Ferreira Bento ◽  
Maria Valéria Schmidt Goffi-Gomez
Keyword(s):  
Speech Recognition ◽  
Cochlear Implants ◽  
Hearing Aids ◽  
Free Field ◽  
Cross Sectional ◽  
Signal Ratio ◽  
Complex Sounds ◽  
Frequency Bands ◽  
Significant Difference ◽  
Before And After

Abstract Introduction The use of cochlear implants and hearing aids (bimodal) has been growing with the expansion of the indication for them, and it is important to ensure protocols so that there is a balance of the loudness regarding the two devices. Objective To evaluate if the limited complex sounds present in the frequency bands of the current devices enable the balance of the loudness in adult users of bimodal stimulation, and to analyze if speech recognition improves after balancing. Methods A prospective cross-sectional study with convenience sampling. The sample was composed of 25 adults who had used either a cochlear implant for at least 6 months or a contralateral hearing aid, with a mean age of 46 years. The balancing of the loudness was performed in an acoustic room with the computer's sound box (0° azimuth at 70 dB SPL). The instrumental sounds were filtered through eight different frequency bands. The patients used both hearing devices and were asked if the sound was perceived to be louder in one of the ears or centrally. The speech test was evaluated with sentence silence (65 dB SPL) and/or noise signal ratio of 0 dB/+ 10 dB in free field at 0° azimuth, before and after balancing. Results: Out of the 25 patients, 5 failed to achieve balance at every tested frequency, and 3 achieved balance at almost every frequency, except 8 kHz. There was a significant difference between the speech recognition test only in silence before and after balancing. Conclusion: Most patients achieved sound equalization at all evaluated frequencies under the complex-sound protocol. Additionally, most patients experienced improved speech recognition after balancing.

scholarly journals Speech perception in various acoustic environments: Comparison of different sound coding strategies

2021 ◽  
Vol 6 (4) ◽  
pp. 14-18
Author(s):  
Oleg V. Kolokolov ◽  
Aleksandr O. Kuznetsov ◽  
Anton S. Machalov ◽  
Tatyana Yu. Vladimirova ◽  
Ivan V. Koshel
Keyword(s):  
Speech Perception ◽  
Sound Field ◽  
Audio Coding ◽  
Noisy Environment ◽  
Speech Processor ◽  
Adult Age ◽  
Sound Coding ◽  
National Medical ◽  
Coding Strategy ◽  
The Difference

Objectives to compare speech perception in a quiet and noisy environment using a basic audio coding strategy (CIS) and a modern strategy (ACE) over a period of 24 months. Material and methods. The study involved 30 patients who received hearing rehabilitation in the National Medical Research Center for Otorhinolaryngology of the Federal Medico-Biological Agency in the period of 2018 2021. The inclusion criteria were: implantation in the adult age (from 18 to 45 years), speaking fluent Russian, hearing loss after speech skills formation. After initialization and programming of the speech processor, the patients underwent speech audiometry in a free sound field using syllabic and speech tables in silence and noise. The results were collected in the special MS Excel templates and subjected to statistical analysis. Results. The intelligibility of syllables in patients with CIS and ACE strategies took comparable values and grew with experience within 24 months (from 52 7.00% at the beginning of the study to 72 7.25% at the end), the greatest increase in intelligibility was noted in the first 3 months after connecting the speech processor (from 52 7.00% to 66 7.87%). Using the Greenberg speech table in silence, the groups with the CIS strategy and the ACE strategy obtained similar results with a slight advantage of the ACE strategy up to 6 months of the study. Later, a significantly higher increase in speech perception was observed in the group with the ACE strategy compared to the group with CIS. After 12 months, the perception tests showed 67 8.62% in patients with CIS strategy and 71 7.54% in patients with ACE, after 24 months the results were 68 9.12%, and 72 8.62% respectively. Under noise conditions, we observed an increase of the difference between groups starting from 6 months (41 5.33% in patients with CIS versus 43.3 7.55% with ACE), the largest difference was registered after 24 months (51 5.50% versus 57 8.25% respectively). Conclusion. When compared to the basic strategy, a modern sound coding strategy with a higher resolution can improve speech perception especially with complex speech patterns and in a noisy environment.

Comparison of the Multipeak and Spectral Peak Speech Coding Strategies of the Nucleus TM 22-Channel Cochlear Implant System

1995 ◽  
Vol 4 (3) ◽  
pp. 49-54 ◽  
Author(s):  
Laura K. Holden ◽  
Margaret W. Skinner ◽  
Timothy A. Holden ◽  
Susan M. Binzer
Keyword(s):  
Speech Recognition ◽  
Cochlear Implant ◽  
Speech Coding ◽  
Recognition Performance ◽  
Sound Field ◽  
Spectral Peak ◽  
Monosyllabic Word ◽  
Coding Strategies ◽  
Implant System

Eight subjects participated in a comparison of the multipeak (MPEAK) and spectral peak (SPEAK) speech coding strategies of the Nucleus TM 22-channel cochlear implant system as part of a long-term monitoring study. Sound-field threshold levels and speech recognition performance on the Bamford-Kowal-Bench Sentence Test, NU-6 Monosyllabic Word Test, and Connected Speech Test or CID Everyday Sentence Test were analyzed for the two speech coding strategies. For the group, speech recognition performance was significantly higher with the SPEAK speech coding strategy than with the MPEAK strategy on all speech tests. For individual subjects, scores with the SPEAK strategy were significantly higher for some subjects on each of the speech tests. None of the subjects scored significantly higher on any of the tests with MPEAK.

Selecting the Optimal FM System for Children With Cochlear Implants

2008 ◽  
Vol 18 (1) ◽  
pp. 19-24
Author(s):  
Erin C. Schafer
Keyword(s):  
Speech Recognition ◽  
Cochlear Implants ◽  
Empirical Research ◽  
Background Noise ◽  
Signal To Noise Ratio ◽  
Evidence Based ◽  
Signal To Noise ◽  
Speech Processor ◽  
System Input ◽  
Optimal Type

Children who use cochlear implants experience significant difficulty hearing speech in the presence of background noise, such as in the classroom. To address these difficulties, audiologists often recommend frequency-modulated (FM) systems for children with cochlear implants. The purpose of this article is to examine current empirical research in the area of FM systems and cochlear implants. Discussion topics will include selecting the optimal type of FM receiver, benefits of binaural FM-system input, importance of DAI receiver-gain settings, and effects of speech-processor programming on speech recognition. FM systems significantly improve the signal-to-noise ratio at the child's ear through the use of three types of FM receivers: mounted speakers, desktop speakers, or direct-audio input (DAI). This discussion will aid audiologists in making evidence-based recommendations for children using cochlear implants and FM systems.

Modified Earpieces and CROS for High Frequency Hearing Losses

1968 ◽  
Vol 11 (1) ◽  
pp. 204-218 ◽  
Author(s):  
Elizabeth Dodds ◽  
Earl Harford
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Hearing Aid ◽  
Sound Field ◽  
Intensity Level ◽  
Test Results ◽  
High Frequency Hearing Loss ◽  
Increased Sensitivity ◽  
Difficult Cases

Persons with a high frequency hearing loss are difficult cases for whom to find suitable amplification. We have experienced some success with this problem in our Hearing Clinics using a specially designed earmold with a hearing aid. Thirty-five cases with high frequency hearing losses were selected from our clinical files for analysis of test results using standard, vented, and open earpieces. A statistical analysis of test results revealed that PB scores in sound field, using an average conversational intensity level (70 dB SPL), were enhanced when utilizing any one of the three earmolds. This result was due undoubtedly to increased sensitivity provided by the hearing aid. Only the open earmold used with a CROS hearing aid resulted in a significant improvement in discrimination when compared with the group’s unaided PB score under earphones or when comparing inter-earmold scores. These findings suggest that the inclusion of the open earmold with a CROS aid in the audiologist’s armamentarium should increase his flexibility in selecting hearing aids for persons with a high frequency hearing loss.

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