Frequency specificity of chirp-evoked auditory brainstem responses

The Journal of the Acoustical Society of America
O Wegner, Torsten Dau

Abstract

This study examines the usefulness of the upward chirp stimulus developed by Dau et al. [J. Acoust. Soc. Am. 107, 1530-1540 (2000)] for retrieving frequency-specific information. The chirp was designed to produce simultaneous displacement maxima along the cochlear partition by compensating for frequency-dependent traveling-time differences. In the first experiment, auditory brainstem responses (ABR) elicited by the click and the broadband chirp were obtained in the presence of high-pass masking noise, with cutoff frequencies of 0.5, 1, 2, 4, and 8 kHz. Results revealed a larger wave-V amplitude for chirp than for click stimulation in all masking conditions. Wave-V amplitude for the chirp increased continuously with increasing high-pass cutoff frequency while it remains nearly constant for the click for cutoff frequencies greater than 1 kHz. The same two stimuli were tested in the presence of a notched-noise masker with one-octave wide spectral notches corresponding to the cutoff frequencies used in the first experiment. The recordings were compared with derived responses, calculated offline, from the high-pass masking conditions. No significant difference in response amplitude between click and chirp stimulation was found for t...Continue Reading

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Citations

Jul 24, 2010·The Journal of the Acoustical Society of America·Matthew A PetoeWayne J Wilson
Jan 15, 2008·The Journal of the Acoustical Society of America·Claus ElberlingEkkehard Stürzebecher
Oct 26, 2010·The Journal of the Acoustical Society of America·Matthew A PetoeWayne J Wilson
Dec 2, 2010·The Journal of the Acoustical Society of America·Mark ChertoffMarie Willis
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Dec 3, 2008·The Journal of the Acoustical Society of America·Claus Elberling, Manuel Don
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Aug 7, 2013·International Journal of Pediatric Otorhinolaryngology·Gabriela Ribeiro Ivo RodriguesDoris Ruthi Lewis

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