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.
Get full access to this article
View all access options for this article.
References
1.
ColeK S, 1968Membranes, Ions and Impulses (Berkeley, CA: University of California Press)
2.
DillierNSpillmannT, 1984“Signal coding for single channel stimulation” in Cochlear Implants eds SchindlerR AMerzenichM M (New York: Raven Press) pp 233–242
3.
HartmannRToppGKlinkeR, 1984“Discharge patterns of cat primary auditory fibers with electrical stimulation of the cochlea”Hearing Research1347–62
4.
HochmairE SHochmair-DesoyerI J, 1983“Percepts elicited by different speech-coding strategies. Cochlear prostheses”Annals of the New York Academy of Sciences405268–279
5.
HochmairE SHochmair-DesoyerI J, 1984“Aspects of sound signal processing using the Vienna intra- and extracochlea implants” in Cochlear Implants eds SchindlerR AMerzenichM M (New York: Raven Press) pp 101–110
6.
Hochmair-DesoyerI JHochmairE SMotzHRattayF, 1984a“A model for the electrostimulation of the nervus acusticus”Neuroscience13553–562
7.
Hochmair-DesoyerI JHochmairE SStiglbrunnerH K, 1984b“Psychoacoustic temporal processing and speech understanding in cochlear implant patients” in Cochlear Implants eds SchindlerR AMerzenichM M (New York: Raven Press) pp 291–304
8.
HodgkinA LHuxleyA F, 1952“A quantitative description of membrane current and its application to conduction and excitation in nerve”Journal of Physiology (London)117500–544
9.
MotzHRattayF, 1986a“Simulation of the functioning of electrostimulation prosthesis for the profoundly deaf”Proceedings of the 2nd Vienna International Workshop on Functional Electrostimulation (Austrian Society for Artificial Organs) pp 167–170
10.
MotzHRattayF, 1986b“A study of the application of the Hodgkin–Huxley and the Frankenhaeuser–Huxley model for the electrostimulation of the acoustic nerve”Neuroscience18699–712
11.
ParkinsC WAndersonJ W (eds), 1983Cochlear Prostheses: An International Symposium. Annals of the New York Academy of Sciences405
12.
RanckJ BJr, 1975“Which elements are excited in electrical stimulation of mammalian central nervous system?: A review”Brain Research98417–440
13.
RattayF, 1986“High frequency electrostimulation of excitable cells”Journal of Theoretical Biology12345–54
14.
RattayF, 1987a“Ways to approximate current–distance relations for electrically stimulated fibers”Journal of Theoretical Biology125339–349
15.
RattayF, 1987b“Modelling and simulation of electrically stimulated nerve and muscle fibers: A review”Mathematics and Computers in Simulation29357–366
16.
RattayF, 1988“Modeling the excitation of fibers under surface electrodes”IEEE Transactions on Biomedical Engineering35 (in press)
17.
RattayFMotzH, 1987“Simulation of the response of a multichannel nerve array to pulse shapes produced by single-channel electrostimulation”Perception16769–776
18.
SchindlerR AMerzenichM M (eds), 1984Cochlear Implants (New York: Raven Press)
19.
WhiteM WMerzenichM MGardiJ, 1984“Multichannel cochlear implants: Channel interactions and processor design”Archives of Otolaryngology110493–501
