gms | German Medical Science

77. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

24.05. - 28.05.2006, Mannheim

NRT Measurements to estimate the Spread Of Excitation in order to optimize and evaluate the PACE Strategy in Nucleus 24 Cochlear Implant Subjects

Meeting Abstract

  • corresponding author presenting/speaker Lutz Gärtner - Department of Otolaryngology, Medical University of Hannover, Hannover, Germany
  • Andreas Büchner - Department of Otolaryngology, Medical University of Hannover, Hannover, Germany
  • Rolf-Dieter Battmer - Department of Otolaryngology, Medical University of Hannover, Hannover, Germany
  • Thomas Lenarz - Department of Otolaryngology, Medical University of Hannover, Hannover, Germany

German Society of Otorhinolaryngology, Head and Neck Surgery. 77th Annual Meeting of the German Society of Otorhinolaryngology, Head and Neck Surgery. Mannheim, 24.-28.05.2006. Düsseldorf, Köln: German Medical Science; 2006. Doc06hno015

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/hno2006/06hno015.shtml

Veröffentlicht: 7. September 2006

© 2006 Gärtner et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

In the last years compression algorithms have been developed to realize a good audio quality at low bit rates. This had been done through the psychoacoustic model which was derived from normal hearing subjects. The strategy ACE (Advanced Combination Encoder) was modified and is known as PACE (Psychoacoustic Advanced Combination Encoder) strategy.

The distribution of the electric field inside the cochlear could be investigated by NRT (Neural Response Telemetry) measurements. If at a fixed electrode the masker is varied from electrode to electrode, a bell-shaped curve results which describes the excitation on the selected electrodes. The resulting pattern is called Spread Of Excitation (SOE).

10 subjects participate at the PACE study. NRT measurements have been done in 9 subjects so far. In 6 cases SOE curves could have been recorded successfully. Correlations have been investigated between speech test results and the width of the SOE curves. SOE curves might help to improve the psychoacoustic model to increase the performance of the PACE strategy.