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Improving Hearing Performance Using Natural Auditory Coding Strategies
Sound transfer from the human ear to the brain is based on three quite different neural coding principles when the continuous temporal auditory source signal is sent as binary code in excellent quality via 30,000 nerve fibers per ear. Cochlear implants are well-accepted neural prostheses for people with sensory hearing loss, but currently the devices are inspired only by the tonotopic principle. According to this principle, every sound frequency is mapped to a specific place along the cochlea. By electrical stimulation, the frequency content of the acoustic signal is distributed via few contacts of the prosthesis to corresponding places and generates spikes there. In contrast to the natural situation, the artificially evoked information content in the auditory nerve is quite poor, especially because the richness of the temporal fine structure of the neural pattern is replaced by a firing pattern that is strongly synchronized with an artificial cycle duration. Improvement in hearing performance is expected by involving more of the ingenious strategies developed during evolution.
Improving Hearing Performance Using Natural Auditory Coding Strategies
Sound transfer from the human ear to the brain is based on three quite different neural coding principles when the continuous temporal auditory source signal is sent as binary code in excellent quality via 30,000 nerve fibers per ear. Cochlear implants are well-accepted neural prostheses for people with sensory hearing loss, but currently the devices are inspired only by the tonotopic principle. According to this principle, every sound frequency is mapped to a specific place along the cochlea. By electrical stimulation, the frequency content of the acoustic signal is distributed via few contacts of the prosthesis to corresponding places and generates spikes there. In contrast to the natural situation, the artificially evoked information content in the auditory nerve is quite poor, especially because the richness of the temporal fine structure of the neural pattern is replaced by a firing pattern that is strongly synchronized with an artificial cycle duration. Improvement in hearing performance is expected by involving more of the ingenious strategies developed during evolution.
Improving Hearing Performance Using Natural Auditory Coding Strategies
Biol.,Med.Physics,Biomed.Engineer. (formerly:Biological,Medical Phys.)
Gruber, Petra (Herausgeber:in) / Bruckner, Dietmar (Herausgeber:in) / Hellmich, Christian (Herausgeber:in) / Schmiedmayer, Heinz-Bodo (Herausgeber:in) / Stachelberger, Herbert (Herausgeber:in) / Gebeshuber, Ille C. (Herausgeber:in) / Rattay, Frank (Autor:in)
20.06.2011
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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