Human frequency-following responses to binaural masking level difference stimuli

Journal of the American Academy of Audiology
James R Wilson, Ananthanarayan Krishnan

Abstract

Binaural masking level difference is the behavioral threshold difference between a diotic condition (SoNo) and a dichotic condition with a 180 degrees interaural phase delay of either the signal (SpiNo) or the masker (SoNpi). Threshold disparity is partially related to coincidence-detecting units in the medial superior olive that are sensitive to low-frequency binaural stimuli with interaural phase differences. Previous surface evoked potential studies report significant latency and amplitude differences to SpiNo stimuli with respect to SoNo stimuli in the P1-N1 auditory event related potential, but no study has reported physiologic masking level differences in a brain stem evoked potential. The human frequency-following response (FFR) represents activity from low-frequency, phase locking neural units in the upper brainstem. Unmasked FFRs to 500 Hz tone bursts and masked FFRs using a 1.5 kHz low-pass masker were recorded from nine normal-hearing adult subjects. Significant reduction in FFR amplitude occurred in the SoNo condition, re the So condition, with masker intensities near the psychoacoustic SoNo masking level. Significant FFR amplitude recovery was observed for both the SoNpi and SpiNo conditions. These results support ...Continue Reading

Citations

Jul 30, 2011·Cerebral Cortex·Judy H SongNina Kraus
Aug 5, 2010·Journal of Cognitive Neuroscience·Judy H SongNina Kraus
Nov 30, 2016·Journal of the Association for Research in Otolaryngology : JARO·Christopher G ClinardMary Ellen Scherer
Jul 28, 2017·Journal of Speech, Language, and Hearing Research : JSLHR·Cynthia G Fowler
Oct 24, 2019·Journal of Speech, Language, and Hearing Research : JSLHR·Nematollah RouhbakhshFati Mousave
Sep 20, 2018·Journal of Neurophysiology·Samira AndersonMatthew J Goupell
Nov 28, 2008·Journal of Neurophysiology·Yi DuLiang Li
Apr 17, 2019·International Journal of Audiology·Kelley GraydonGary Rance
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Dichotic Listening Tests
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