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An Automatic Sequential Recognition Method for Cortical Auditory Evoked Potentials

Hoppe, U, Weiss, S, Stewart, R W and Eysholdt, U (2001) An Automatic Sequential Recognition Method for Cortical Auditory Evoked Potentials IEEE Transactions on Biomedical Engineering, 48, (2), pp. 154-164.

Record type: Article

Abstract

The detection of cortical auditory evoked potentials (CAEP), which are part of the electroencephalogram (EEG) in reaction to acoustic stimuli, has important applications such as determining objective audiograms. The detection is usually performed by a human operator, with support from often basic signal processing methods. This paper presents a novel mechanism for the detection of CAEPs, which is fully automatic and stops the measurement when a given confidence is reached. This proposed detector comprises of three stages. First, a feature extraction by a wavelet transform parameterizes the time domain EEG signal by only few transform coefficients. This feature vector is then classified by a neural network which yields a binary vote on every EEG segment. Finally, a sequential statistical test is performed on successive classifications; this stops the measurement if a specified decision confidence has been reached. The adjustment of the detector according to a clinical database is discussed. Thus adjusted, the proposed CAEP detection scheme is applied to a study, and compared with a human operator. The results demonstrate that this method can attain similar results, but outperforms the human expert for stimulation levels close to the hearing threshold.

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More information

Published date: February 2001
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 253998
URI: http://eprints.soton.ac.uk/id/eprint/253998
ISSN: 0018-9294
PURE UUID: 2f38d770-6920-4656-9fbc-4d0e9e06d37e

Catalogue record

Date deposited: 19 Nov 2001
Last modified: 18 Jul 2017 09:55

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Contributors

Author: U Hoppe
Author: S Weiss
Author: R W Stewart
Author: U Eysholdt

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