Archives of Acoustics, 18, 2, pp. 131-138, 1993

Detection of low intensity auditory evoked responses

F. Grandori
Polytechnic of Milan, Milan

A signal processing technique based on the use of crosscorrelation func-tions is proposed for the analysis of the auditory evoked brainstem response (ABB). Detection of a response as well as estimation of its position along the time axis (group latency) are shown to be significantly improved after correla-tion analysis. Results indicate that the method may be applied to systematical investigations of the responses measured — with surface electrodes on the scalp — at extremely low intensity levels.
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