The effect of forward masker duration, rise/fall time, and integrated pressure on auditory brain stem evoked responses in human newborns and adults.
The effects of duration, rise/fall time, integrated pressure, and intensity of a forward masker on the auditory brain stem evoked response (ABR) were examined in three studies. Keeping peak masker intensity constant, integrated masker pressure was a better predictor of ABR latency prolongation than masker duration or rise/fall time in human newborns. Masker effects varied as a function of masker intensity. Greater ABR latency prolongation was observed for more intense maskers. Furthermore, latency prolongation was observed with increasing masker duration for high-intensity, but not low-intensity maskers. Forward masking had a greater effect on newborn wave V latencies than adult wave V latencies; however, increasing masker duration had similar effects on newborn and adult wave V latencies.
Lasky
R E
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Department of Neurology, University of Wisconsin-Madison Medical School.
D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001307:Auditory Perception; D001309:Auditory Threshold; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010470:Perceptual Masking; D013997:Time Factors