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development_of_speech_discrimination_in_implanted_patients [2014/03/18 19:52] (current)
bziolko created
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 +Artur Lorens, Malgorzata Zgoda, Anna Geremek, Henryk Skarżyński (Poland)
 +**Development of speech discrimination in implanted patients**
 +Traditional hearing aid function is based on the amplification of sounds to enhance signal detection, a cochlear implant (CI) is an electronic hearing prosthesis which provides a direct electrical stimulation to the acoustic nerve endings, bypassing the damaged portion of the auditory system to create a perception of sound in cases of profound and total hearing loss. To probe the speech discrimination development after cochlear implantation tests of speech reception were performed using the Pruszewicz monosyllabic Polish word test (20 words per list, 20 lists), with the lists of words being randomized between test conditions We observed a significant increase in the speech discrimination first 3 months after the activation of the implant, under both quiet and noisy conditions. There appears to be a plateau effect after 3 months for quiet conditions and after 6 months for noisy conditions, the evidence for this claim being that there are only small increases in scores after these times. The speech test results are stable over time. In order to explain the mechanism of speech discrimination development after CI we will discuss how brain functions determine the listening success. Our theoretical motivation is based on an extensive body of research in the field of Cognitive Psychology structured around the information-processing Framework. Based on assumptions drawn from the general information-processing approach and own experiences in developing mathematical models of the auditory perception, a novel model of information processing by CI users will be proposed.
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