Effects of complex tonal stimuli on latency and amplitude of a late auditory evoked potential.

An optimum stimulus for evoking late auditory potentials is not well established. A typical stimulus for clinical purposes is either a brief speech signal or a brief single-frequency tone. Based on previous research, it is reasonable to assume that a complex stimulus may enhance waveform morphology relative to a single-frequency stimulus.

P1 amplitude across replicates: does measurement method make a difference?

Purpose: Most cortical auditory evoked potentials instruments provide a "default" peak-to-baseline (P-B) amplitude and a means for obtaining a peak-to-trough (P-T) measure. This study investigated the sensitivity of these two measures in assessing the effects of repeated runs on the P1 component of the electrophysiological response.

Methods: Cortical auditory evoked potentials were recorded on 30 normal hearing young adults.