Effects of high-rate pulse trains on electrode discrimination in cochlear implant users. Trends Amplif 2009 Jun;13(2):76-86
Date
05/19/2009Pubmed ID
19447763Pubmed Central ID
PMC2763511DOI
10.1177/1084713809336739Scopus ID
2-s2.0-65649148257 (requires institutional sign-in at Scopus site) 2 CitationsAbstract
Overcoming issues related to abnormally high neural synchrony in response to electrical stimulation is one aspect in improving hearing with a cochlear implant. Desynchronization of electrical stimuli have shown benefits in neural encoding of electrical signals and improvements in psychophysical tasks. In the present study, 10 participants with either CII or HiRes 90k Advanced Bionics devices were tested for the effects of desynchronizing constant-amplitude high-rate (5,000 Hz) pulse trains on electrode discrimination of sinusoidal stimuli (1,000 Hz). When averaged across the sinusoidal dynamic range, overall improvements in electrode discrimination with high-rate pulses were found for 8 of 10 participants. This effect was significant for the group (p = .003). Nonmonotonic patterns of electrode discrimination as a function of sinusoidal stimulation level were observed. By providing additional spectral channels, it is possible that clinical implementation of constant-amplitude high-rate pulse trains in a signal processing strategy may improve performance with the device.
Author List
Runge-Samuelson CLAuthor
Christina Runge PhD Associate Provost, Chief, Professor in the Otolaryngology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Acoustic StimulationAdult
Aged
Aged, 80 and over
Auditory Pathways
Auditory Perception
Auditory Threshold
Cochlear Implantation
Cochlear Implants
Correction of Hearing Impairment
Deafness
Equipment Design
Female
Humans
Male
Middle Aged
Persons With Hearing Impairments
Psychoacoustics
Signal Detection, Psychological
Signal Processing, Computer-Assisted
Young Adult
