title: Brainstem response (ABR) to rarefaction and condensation clicks in normal hearing and steep high-frequency hearing loss.
abstract: ABR in response to 2.0 kHz haversine waves was obtained in normal-hearing subjects and in 27 ears with steep high frequency hearing loss. Rarefanction (R) clicks had a significantly shorter latency to wave V than condensation (C) clicks (mean = 0.13 ms SD = 0.16 ms, p less than 0.001). This value corresponds to a frequency of generation of ABR of 3-4 kHz. The latency difference between R and C clicks increased in reversed proportion to the cut-off frequency of the pure tone audiogram in the ears with steep high-frequency hearing loss. It was concluded that R-C latency difference can be used as an approximate indication of frequency of generation of ABR.
mesh_terms: D000161:Acoustic Stimulation; D001933:Brain Stem / Q000502:physiology* / Q000503:physiopathology; D005072:Evoked Potentials, Auditory; D034381:Hearing Loss / Q000503:physiopathology*; D006316:Hearing Loss, High-Frequency / Q000503:physiopathology*; D006801:Humans; D011930:Reaction Time; D012016:Reference Values