Waveform Discrimination of Auditory Brain Stem Responses by a New Digital Artifact Rejecter

A new apparatus for improving the signal to noise ratio of electrophysiological on-going activities before averaging the auditory brain stem responses (ABR) in man was successfully developed. A new digital artifact rejecter can discriminate good signals in ABR audiometry by means of the computer technique. The usefulness of this apparatus was amply proven in recording ABR in this study, It was a great advantage of this digital method that good waveforms of ABR could be obtained from the electrophysiological data in man by avoiding any deformation of original waveform patterns of ABR.