Abstract
Derived-band auditory brainstem responses (ABRs) were obtained in 5 normal-hearing and 12 sensorineurally hearing-impaired listeners. The latencies extracted from these responses as a function of the derived-band center frequency served as objective estimates of cochlear response times. In addition, two behavioral measurements were carried out. In the first experiment, differences between frequency-specific cochlear response times were estimated, using the lateralization of pulsed tones, interaurally mismatched in frequency. In the second experiment, auditory-filter bandwidths were estimated using a notched-noise masking paradigm. The correspondence between objective and behavioral estimates of cochlear response times was examined. An inverse relationship between the ABR latencies and the filter bandwidths could be demonstrated as the result of the larger across-listener variability among the hearing-impaired listeners, as compared to the normal-hearing listeners. The results might be useful for a better understanding of how hearing impairment affects the spatiotemporal cochlear response pattern in human listeners.
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