PMID: 591780Nov 1, 1977

A multiple electrode cochlear implant

The Journal of Laryngology and Otology
G M ClarkD J Dewhurst

Abstract

The University of Melbourne Departments of Otolaryngology and Electrical Engineering (UMDOLEE) receiving and stimulating component of a multiple-electrode cochlear implant hearing prosthesis produces constant stimulation. It has a stimulating pulse shape that minimizes the production of toxic substances and loss of metal from the electrodes, and this is achieved with a biphasic rectangular waveform where the first phase is negative with respect to ground. The duration of each stimulus phase in 180 msec, which is long enough to allow low levels of current stimulation, and short enough to permit rates of 1000 pulses/second to be achieved. In order to be consistent with our present understanding of the perception of pitch, the device permits the independent stimulation of a number of electrodes. Furthermore, to electrically isolate the stimulus to small areas, there is the capacity to vary the current and set the threshold independently at individual electrodes. The phase and amplitude of the pulses to neighbouring electrodes with also be varied to assist in localizing the current flow. The pattern to stimulation to individual or groups of electrodes can also be altered to enable studies to be carried out to determine ways of conv...Continue Reading

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Citations

Jan 1, 1980·Archives of Oto-rhino-laryngology·I J Hochmair-DesoyerK Burian
Oct 5, 2007·Biomedical Microdevices·Kathleen W MeachamStephen P DeWeerth
Jun 1, 1985·Hearing Research·Stephen J O'LearyG M Clark
May 15, 2001·The Journal of Physiology·Arthur ProchazkaD B McCreery
Nov 1, 2011·Journal of Physiology, Paris·Sébastien Joucla, Blaise Yvert
Sep 23, 2009·IEEE Transactions on Bio-medical Engineering·Liu Shi Gan, Arthur Prochazka
Mar 16, 2007·IEEE Transactions on Bio-medical Engineering·Liu Shi GanK Ming Chan
Aug 27, 2005·IEEE Transactions on Bio-medical Engineering·Paul B Yoo, Dominique M Durand
Feb 16, 2012·Cochlear Implants International·G M Clark
Apr 22, 2006·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·G M Clark
Mar 1, 1979·The Journal of Laryngology and Otology·G M ClarkQ R Bailey
Jan 1, 1984·Acta Oto-laryngologica. Supplementum·L D TsouK Hu
May 1, 1981·The Annals of Otology, Rhinology, and Laryngology·G M ClarkJ F Patrick
Apr 11, 2018·International Journal for Numerical Methods in Biomedical Engineering·Ángel Ramos-de-MiguelÁngel Ramos-Macías
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Related Concepts

Auditory Perception
Cochlear Structure
Cochlear Nerve
Electric Stimulation Technique
Implantable Stimulation Electrodes
Ear Molds
Prosthesis Design

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