Klinik und Poliklinik für Hals-, Nasen- u. Ohrenkranke
Josef Schneider Str 11, D-97080 Würzburg
Research foci (and basic equipment-based research projects):
Speech Intelligibility in bilateral Cochlear Implant (CI) users: As a standard, canditates are supplied with a CI unilateral today. It is well known that listening with two ears allows subjects with normal hearing or using hearing aids to understand speech better in background noise or in reverberant environments. One can assume, the same ist true for CI users.
CI users benefit from two CIs. They report two CIs sound more clear und natural. Hearing with two CIs eliminates a strong handicap caused by the head shadow effect. Every time the sound source is placed at the opposite to the CI, the signal to noise ratio is reduced by about 7 dB and the intelligibility of speech becomes worse. Using bilateral CIs improved speech understanding further. The effect of masking was reduced. By this speech intelligibility increased by about 10% in a three loudspeaker arrangement and the SRT decreas about 4 db measured in a four loudspeaker arrangement. Müller J, Schön F, Helms J, Speech understanding in quiet and noise in bilateral users of the MED-EL Combi 40/40+ cochlear implant system, Ear & Hearing 23: 198-206 (2002) / Schön F, Müller J, Helms J, Speech reception thresholds obtained in a symmetrical four-loudspeaker arrangement fram bilateral users of the MED-El cochlear implant.