Spectral composition of infant auditory brainstem responses: implications for filtering.
Auditory brainstem responses (ABRs) were recorded from 20 normal neonates and 10 normal-hearing adults. The spectral compositions of ABRs from both groups were compared. Results indicated that significant amounts of low-frequency information are concentrated below 150 Hz in both the neonate and the adult ABRs although the neonate ABR has a slightly greater percentage of low-frequency information than that of the adults. This has implications for filtering during ABR recording. A low high-pass setting which preserves more of the low-frequency information will allow enhanced detectability of wave V in neonate ABRs recorded at low stimulus intensities. Furthermore, our experience indicates that the use of a 30- to 3,000-Hz bandpass is feasible in the neonatal intensive care unit as well as in the regular newborn nursery. Therefore the use of a 30- to 3,000-Hz bandpass is recommended for neonate ABR recordings.
Spivak
L G
LG
Adelphi University, Garden City, N.Y. 11530.
D000161:Acoustic Stimulation; D000328:Adult; D001309:Auditory Threshold; D001844:Bone Conduction; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006309:Hearing; D006801:Humans; D007231:Infant, Newborn; D008297:Male