Relation between derived-band auditory brainstem response latencies and behavioral frequency selectivity.
Derived-band click-evoked auditory brainstem responses (ABRs) were obtained for normal-hearing (NH) and sensorineurally hearing-impaired (HI) listeners. The latencies extracted from these responses, as a function of derived-band center frequency and click level, served as objective estimates of cochlear response times. For the same listeners, auditory-filter bandwidths at 2 kHz were estimated using a behavioral notched-noise masking paradigm. Generally, shorter derived-band latencies were observed for the HI than for the NH listeners. Only at low click sensation levels, prolonged latencies were obtained for some of the HI listeners. The behavioral auditory-filter bandwidths accounted for the across-listener variability in the ABR latencies: Cochlear response time decreased with increasing filter bandwidth, consistent with linear-system theory. The results link cochlear response time and frequency selectivity in human listeners and offer a window to better understand how hearing impairment affects the spatiotemporal cochlear response pattern.
Strelcyk
Olaf
O
Centre for Applied Hearing Research, Department of Electrical Engineering, Technical University of Denmark, Building 352, Ørsteds Plads, 2800 Kongens Lyngby, Denmark.
Christoforidis
Dimitrios
D
Dau
Torsten
T
D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001307:Auditory Perception / Q000502:physiology*; D003051:Cochlea / Q000503:physiopathology*; D016057:Evoked Potentials, Auditory, Brain Stem; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D010470:Perceptual Masking / Q000502:physiology*; D011571:Psychoacoustics; D011930:Reaction Time; D013997:Time Factors; D055815:Young Adult