Signal Analysis by using Adaptive Filterbanks in Cochlear Implants

Albalate A, Nogueira W, Edler B, Büchner A (2006)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2006

Publisher: IEEE

Pages Range: 210-213

Conference Proceedings Title: 2006 IEEE Biomedical Circuits and Systems Conference

Event location: London GB

ISBN: 978-1-4244-0436-0

URI: http://www.tnt.uni-hannover.de/papers/data/2006aawn01.pdf

DOI: 10.1109/BIOCAS.2006.4600345

Abstract

Current speech processing in cochlear implants use a filterbank to analyse audio signals into several frequency bands, each associated with one electrode. Because the processing is performed on input signal blocks of fixed sizes, the filterbank provides a unique time-frequency resolution to represent the various signal features. However, different components of audio signals may require different time-frequency resolutions for an accurate representation and perception. In this paper we investigate the influence on speech intelligibility in cochlear implants users when filterbanks with different time-frequency resolutions are used. In order to represent all signal features accurately, an adaptive filterbank has been developed that accepts input blocks of different sizes. The different resolutions required are achieved by adequately switching between block sizes depending on the input signal characteristics. The filterbank was incorporated into the commercial Advanced Combinational Encoder (ACE) and acutely tested on six cochlear implant recipients.

Authors with CRIS profile

Bernd Edler Lehrstuhl für Audiosignalanalyse (AudioLabs)

Involved external institutions

Medizinische Hochschule Hannover (MHH) / Hannover Medical School DE Germany (DE) Universität Ulm DE Germany (DE)

How to cite

APA:

Albalate, A., Nogueira, W., Edler, B., & Büchner, A. (2006). Signal Analysis by using Adaptive Filterbanks in Cochlear Implants. In 2006 IEEE Biomedical Circuits and Systems Conference (pp. 210-213). London, GB: IEEE.

MLA:

Albalate, Amparo, et al. "Signal Analysis by using Adaptive Filterbanks in Cochlear Implants." Proceedings of the 2006 IEEE Biomedical Circuits and Systems Conference, London IEEE, 2006. 210-213.

BibTeX: Download