Effect of high-pass filtering on the neonatal auditory brainstem response to air- and bone-conducted clicks.
The effect of standard high-pass analog filtering on the neonatal auditory brainstem response (ABR) to air- and bone-conducted clicks at low intensity screening levels was investigated. Simultaneous three channel recorded ABRs were obtained from 20 neonates with filter settings of 30-3000, 100-3000, and 150-3000 Hz at intensity levels of 20, 30, and 40 dB nHL. Statistically significant reductions in wave V amplitude and decreases in wave V latency were observed for both transducers across all three low level stimulus intensities with the progressive increase in the high-pass filter cutoff (p < .05). These data support the advocacy of less restrictive high-pass filtering (e.g., 30 Hz) for neonatal and infant ABR screening to air- and bone-conducted clicks.
Stuart
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Department of Psychology, School of Human Communication Disorders, Dalhousie University, Halifax, Canada.
Yang
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D000328:Adult; D001307:Auditory Perception / Q000502:physiology; D001844:Bone Conduction; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D006309:Hearing / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn