scholarly journals Signal Processing Strategies for Cochlear Implants Using Current Steering

2009 ◽  
Vol 2009 (1) ◽  
Author(s):  
Waldo Nogueira ◽  
Leonid Litvak ◽  
Bernd Edler ◽  
Jörn Ostermann ◽  
Andreas Büchner
Keyword(s):  
Signal Processing ◽  
Cochlear Implants ◽  
Current Steering ◽  
Processing Strategies

scholarly journals Development of auditory and language skills in children using cochlear implants with two signal processing strategies

2020 ◽  
Vol 86 (6) ◽  
pp. 720-726
Author(s):  
Tatiana Mendes de Melo ◽  
Elisabete Honda Yamaguti ◽  
Adriane Lima Mortari Moret ◽  
Orozimbo Alves Costa ◽  
Natália Barreto Frederigue Lopes
Keyword(s):  
Signal Processing ◽  
Cochlear Implants ◽  
Language Skills ◽  
Processing Strategies

Music Perception in Adult Users of Cochlear Implants: A Brief Review

2015 ◽  
Vol 22 (1) ◽  
pp. 4-11
Author(s):  
Robert C. Jensen ◽  
Sarah Hargus Ferguson
Keyword(s):  
Cochlear Implants ◽  
Music Perception ◽  
Training Programs ◽  
Musical Training ◽  
Current Steering ◽  
Structure Information ◽  
Auditory Nervous System ◽  
Processing Strategies ◽  
Melody Perception ◽  
Place Pitch

Although cochlear implants (CIs) can provide good speech understanding in quiet, in general, users of CIs have shown poor music perception performance, particularly with regard to pitch (and hence melody). This is primarily due to the limited ability of CI processing strategies and electric stimulation to provide place pitch and fine structure information from the original input signal to the auditory nervous system of the user. Approaches such as current focusing, current steering, enhanced amplitude modulation cues, and optic stimulation have been shown or theorized to assist in music perception, as have musical training programs. This article is a brief review of research related to music perception in adults with CIs, specifically their rhythm, pitch, and melody perception performance; processing strategies that have been or are being developed which might improve their music perception performance; and music training programs that have been shown to improve their music perception performance.

scholarly journals A Daily Alternating Method for Comparing Different Signal-Processing Strategies in Hearing Aids and in Cochlear Implants

2008 ◽  
Vol 19 (05) ◽  
pp. 443-454 ◽  
Author(s):  
Richard S. Tyler ◽  
Shelley A. Witt ◽  
Camille C. Dunn ◽  
Ann E. Perreau
Keyword(s):  
Signal Processing ◽  
Cochlear Implants ◽  
Hearing Aids ◽  
Daily Basis ◽  
The Other ◽  
Processing Strategy ◽  
Clear Advantage ◽  
Processing Strategies ◽  
Listening Experience ◽  
Post Trial

Background: Although we always want to select the best signal-processing strategy for our hearing-aid and cochlear-implant patients, no efficient and valid procedure is available. Comparisons in the office are without listening experience, and short-term take-home trials are likely influenced by the order of strategies tried. Purpose: The purpose of this study was to evaluate a new procedure for comparing signal-processing strategies whereby patients listen with one strategy one day and another strategy the next day. They continue this daily comparison for several weeks. We determined (1) if differences existed between strategies without prior listening experience and (2) if performance differences (or lack there of) obtained at the first listening experience are consistent with performance after two to three months of alternating between strategies on a daily basis (equal listening experience). Research Design: Eight subjects were tested pretrial with a vowel, sentence, and spondee recognition test, a localization task, and a quality rating test. They were required to listen to one of two different signal processing strategies alternating between strategies on a daily basis. After one to three months of listening, subjects returned for follow-up testing. Additionally, subjects were asked to make daily ratings and comments in a diary. Results: Pre-trial (no previous listening experience), a clear trend favoring one strategy was observed in four subjects. Four other subjects showed no clear advantage. Post-trial (after alternating daily between strategies), of the four subjects who showed a clear advantage for one signal processing strategy, only one subject showed that same advantage. One subject ended up with an advantage for the other strategy. Post-trial, of the four subjects who showed no advantage for a particular signal processing strategy, three did show an advantage for one strategy over the other. Conclusion: Patients are willing to alternate between signal processing strategies on a daily basis for up to three months in an attempt to determine their optimal strategy. Although some patients showed superior performance with initial fittings (and some did not), the results of pre-trial comparison did not always persist after having equal listening experience. We recommend this daily alternating listening technique when there is interest in determining optimal performance among different signal processing strategies when fitting hearing aids or cochlear implants.

Current Steering and Current Focusing in Cochlear Implants: Comparison of Monopolar, Tripolar, and Virtual Channel Electrode Configurations

2008 ◽  
Vol 29 (2) ◽  
pp. 250-260 ◽  
Author(s):  
Carlo K. Berenstein ◽  
Lucas H. M. Mens ◽  
Jef J. S. Mulder ◽  
Filiep J. Vanpoucke
Keyword(s):  
Cochlear Implants ◽  
Virtual Channel ◽  
Current Steering ◽  
Current Focusing ◽  
Channel Electrode

scholarly journals Pitch ranking, electrode discrimination, and physiological spread of excitation using current steering in cochlear implants

2014 ◽  
Vol 136 (6) ◽  
pp. 3159-3171 ◽  
Author(s):  
Jenny L. Goehring ◽  
Donna L. Neff ◽  
Jacquelyn L. Baudhuin ◽  
Michelle L. Hughes
Keyword(s):  
Cochlear Implants ◽  
Current Steering ◽  
Spread Of Excitation

Signal Processing Strategies for Electrostimulated Ear Prostheses Based on Simulated Nerve Response

Perception ◽  
1987 ◽  
Vol 16 (6) ◽  
pp. 777-784 ◽  
Author(s):  
Hans Motz ◽  
Frank Rattay
Keyword(s):  
Signal Processing ◽  
Nerve Response ◽  
Processing Strategies ◽  
Coding Strategy ◽  
Vowel Recognition

Improvements to the coding strategy of prostheses for the profoundly deaf which can be implemented by the speech processors of these devices are suggested. Difficulties with vowel recognition are diagnosed as being due to nerve properties. These are studied with the aid of a model in order to find ways of overcoming the difficulties.

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