Coding of Electrical Stimulation Patterns for Binaural Sound Coding Strategies for Cochlear Implants

2019 ◽  
Author(s):  
Reemt Hinrichs ◽  
Tom Gajecki ◽  
Jorn Ostermann ◽  
Waldo Nogueira
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implants ◽  
Sound Coding ◽  
Coding Strategies ◽  
Binaural Sound

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.

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.

Effects of speech-coding strategies on speech perception performance in Mandarin-speaking children with Nucleus 24 cochlear implants

2004 ◽  
Vol 5 (S1) ◽  
pp. 45-47
Author(s):  
Chuan-Jen Hsu ◽  
Shih-Hsuan Shiao ◽  
Yuh-Shyang Chen ◽  
Mei-Ji Horng ◽  
Qian-Jie Fu
Keyword(s):  
Speech Perception ◽  
Cochlear Implants ◽  
Speech Coding ◽  
Coding Strategies ◽  
Nucleus 24

Cortical reponses to electrical stimulation from cochlear implants

2002 ◽  
Vol 112 (5) ◽  
pp. 2220-2221
Author(s):  
Emily A. Tobey ◽  
Michael D. Devous ◽  
Peter S. Roland
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implants

Electrical Stimulation of the Auditory Nerve via Cochlear Implants in Patients with Auditory Neuropathy

2002 ◽  
Vol 111 (5_suppl) ◽  
pp. 29-31 ◽  
Author(s):  
Yvonne S. Sininger ◽  
Patricia Trautwein
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implants ◽  
Auditory Nerve ◽  
Otoacoustic Emissions ◽  
Outer Hair Cell ◽  
Cell Function ◽  
Auditory Neuropathy ◽  
Auditory Brain Stem Response ◽  
Average Performance ◽  
Auditory Brain Stem

Auditory neuropathy (AN) is a term used to describe an auditory disorder in which there is evidence of normal outer hair cell function (otoacoustic emissions and/or cochlear microphonics) and poor function of the auditory nerve (absent or highly distorted auditory brain stem response starting with wave I). Many of these patients have evidence of generalized peripheral nerve disease, leading to an assumption that the peripheral portion of the auditory nerve is the most likely site of lesion. A small group of these patients has received cochlear implants, and the majority of them achieve average to above-average performance. Although this outcome may seem incongruous with neural disease, average performance by patients with AN may be a result of the reintroduction of neural synchrony by electrical stimulation and/or the fact that most deaf patients have poor nerve survival. Although cochlear implants are promising for deaf patients with AN, more study of the disorder is needed.

scholarly journals Hearing restoration by a low-weight power-efficient multichannel optogenetic cochlear implant system

2020 ◽  
Author(s):  
Lukasz Jablonski ◽  
Tamas Harczos ◽  
Bettina Wolf ◽  
Gerhard Hoch ◽  
Alexander Dieter ◽  
...  
Keyword(s):  
Cochlear Implants ◽  
Acoustic Stimulation ◽  
Power Efficient ◽  
Fine Grained ◽  
Sound Coding ◽  
Large Sets ◽  
Current Spread ◽  
Low Weight ◽  
Implant System ◽  
And Control

In case of deafness, cochlear implants bypass dysfunctional or lost hair cells by direct electrical stimulation (eCIs) of the auditory nerve. However, spectral selectivity of eCI sound coding is low as the wide current spread from each electrode activates large sets of neurons that align to a place-frequency (tonotopic) map in the cochlea. As light can be better confined in space, optical cochlear implants (oCIs) promise to overcome this shortcoming of eCIs. This requires fine-grained, fast, and power-efficient real-time sound analysis and control of multiple microscale emitters. Here, we describe the development, characterisation, and application for hearing restoration of a preclinical low-weight and wireless LED-based multichannel oCI system and its companion eCI system. The head-worn oCI system enabled deafened rats to perform a locomotion task in response to acoustic stimulation proving the concept of multichannel optogenetic hearing restoration in rodents.

scholarly journals Sound Coding in Cochlear Implants: From electric pulses to hearing

2015 ◽  
Vol 32 (2) ◽  
pp. 67-80 ◽  
Author(s):  
Jan Wouters ◽  
Hugh Joseph McDermott ◽  
Tom Francart
Keyword(s):  
Cochlear Implants ◽  
Electric Pulses ◽  
Sound Coding
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