NRT: Comparison of Artefact Cancellation and Threshold Estimation Techniques

Abstract

Neural response telemetry (NRT) is a process of recording electrically evoked compound action potential (ECAP) from the auditory nerve in individuals with cochlear implants. Since ECAP is a very early potential, there is an adverse effect of stimulus artefact on the recording of the ECAP via NRT. Several approaches have been proposed to reduce the stimulus artefact in NRT. A comparison of three such techniques for artefact reduction was made. Results revealed that all the techniques can be used to record NRT. A comparison of techniques available to determine the threshold NRT (T-NRT) was also done and results revealed that the visual estimation of T-NRT was a better choice.