Patent ID: 6503207
Filing Date: 2003-01-07
Classification: A61B

Abstract:
A multi-mode audiometric apparatus for testing hearing, comprising:stimulus generating means for transmitting at least one true random stimulus sequence to a subject's inner ear, said true random stimulus sequence having a first stimulus rate; first detection means for detecting at least one auditory evoked potential (AEP) signal, said AEP signal having at least a first waveform, said first waveform including a plurality of AEP signal data; second detection means for detecting at least one otoacoustic emission (OAE) signal, said OAE signal having at least a second waveform; signal analyzer means for analyzing said AEP and OAE signals, said signal analyzer means including first averager means for reconstructing said first waveform, said first averager means including sampling means for sampling said first waveform, said sampling means including means for applying a plurality of true random frequencies to said plurality of AEP signal data to reconstruct said first waveform, said signal analyzer means further including second averager means for reconstructing said second waveform; and synchronization means for synchronizing said stimulus generating means and said signal analyzer means.