Multícentric Field Evaluation of a New Speech Coding Strategy for Cochlear Implants

1995 ◽  
Vol 34 (3) ◽  
pp. 145-159 ◽  
Author(s):  
Norbert Dillier ◽  
Rolf D. Baltmer ◽  
Wolfgang H. Döring ◽  
Joachim Muller-deile
Keyword(s):  
Cochlear Implants ◽  
Speech Coding ◽  
Field Evaluation ◽  
Coding Strategy

Effect of Frequency Boundary Assignment on Speech Recognition with the Nucleus 24 ACE Speech Coding Strategy

2007 ◽  
Vol 18 (08) ◽  
pp. 700-717 ◽  
Author(s):  
Marios S. Fourakis ◽  
John W. Hawks ◽  
Laura K. Holden ◽  
Margaret W. Skinner ◽  
Timothy A. Holden
Keyword(s):  
Speech Recognition ◽  
Speech Perception ◽  
Cochlear Implants ◽  
Speech Coding ◽  
Frequency Assignment ◽  
Speech Stimuli ◽  
Unlimited Number ◽  
Coding Strategy ◽  
Technological Limitations ◽  
Nucleus 24

The choice of frequency boundaries for the analysis channels of cochlear implants has been shown to impact the speech perception performance of adult recipients (Skinner et al, 1995; Fourakis et al, 2004). While technological limitations heretofore have limited the clinical feasibility of investigating novel frequency assignments, the SPEAR3 research processor affords the opportunity to investigate an unlimited number of possibilities. Here, four different assignments are evaluated using a variety of speech stimuli. All participants accommodated to assignment changes, and no one assignment was significantly preferred. The results suggest that better performance can be achieved using a strategy whereby (1) there are at least 7-8 electrodes allocated below 1000 Hz, (2) the majority of remaining electrodes are allocated between 1100 - 3000 Hz, and (3) the region above 3 kHz is represented by relatively few electrodes (i.e., 1-3). The results suggest that such frequency assignment flexibility should be made clinically available. La escogencia de límites de frecuencia para los canales de análisis de los implantes cocleares se ha visto que impacta el desempeño en la percepción del lenguaje de adultos implantados (Skinner y col, 1995; Fourakis y col, 2004). Mientras que las limitaciones tecnológicas hasta este momento han restringido la factibilidad clínica de investigar nuevas asignaciones de frecuencia, el procesador experimental SPEAR3 ofrece la oportunidad de investigar un número ilimitado de posibilidades. Aquí, se evalúan cuatro asignaciones diferentes utilizando una variedad de estímulos de lenguaje. Todos los participantes se acomodaron a los cambios de asignación y ninguna asignación tuvo una preferencia significativa. Los resultados sugieren que puede obtenerse un desempeño mejor utilizando una estrategia donde (1) existan al menos 7-8 electrodos colocados por debajo de 1000 Hz, (2) la mayoría de los electrodos remanentes sean colocados entre 1100 – 3000 Hz, y (3) la región por encima de 3 kHz esté representada por relativamente pocos electrodos (p.e., 1-3). Los resultados sugieren que tal flexibilidad en la asignación de frecuencias debería estar clínicamente disponible.

scholarly journals A Psychoacoustic "NofM"-Type Speech Coding Strategy for Cochlear Implants

2005 ◽  
Vol 2005 (18) ◽  
Author(s):  
Waldo Nogueira ◽  
Andreas Büchner ◽  
Thomas Lenarz ◽  
Bernd Edler
Keyword(s):  
Cochlear Implants ◽  
Speech Coding ◽  
Coding Strategy

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

Evaluation of the Harmony Soundprocessor in Combination With the Speech Coding Strategy HiRes 120

2008 ◽  
Vol 29 (2) ◽  
pp. 199-202 ◽  
Author(s):  
Martina Brendel ◽  
Andreas Buechner ◽  
Beate Krueger ◽  
Carolin Frohne-Buechner ◽  
Thomas Lenarz
Keyword(s):  
Speech Coding ◽  
Coding Strategy
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