Towards an index of stability of auditory evoked potentials

Approximately one to six for every thousand children born and one third to half of the elderly population present some degree of hearing loss. Conventional audiometry is the most common test for hearing assessment, but depends on the subjective assessment of the person being tested, so it cannot be performed in newborns or individuals unable/unwilling to cooperate. Alternatively, auditory evoked potentials (AEPs) are responses that can be recorded from the brain following presentation of auditory stimuli that can be used to objectively assess the integrity of the auditory system from outer ear via the neuronal relays in the brain stem to the auditory cortex. Several types of stimuli have been used to elicit these responses, and there is a current trend towards the use of syllables, speech and complex sounds, which produce significant variations in the AEPs, thus creating a problem for the subsequent manual or automatic interpretation of the responses.

The aim of this project is to record a database of AEPs in response to different well-defined auditory stimuli, and test a set of algorithms to quantify the variation in the responses in order to obtain an index of the stability of AEPs.

Project participants:
Interacoustics A/S
Oticon A/S

For more information, contact Project Leader:
Professor Søren Holdt Jensen
Aalborg University, Department of Electronic Systems
shj@es.aau.dk