Assessing the processing of interaural temporal disparities within high frequency stimuli via manipulations of the temporal signatures of their envelopes

Authors

  • Leslie R. Bernstein Departments of Neuroscience and Surgery (Otolaryngology), University of Connecticut Health Center, Farmington, CT, USA
  • Constantine Trahiotis Departments of Neuroscience and Surgery (Otolaryngology), University of Connecticut Health Center, Farmington, CT, USA

Abstract

During the past several years, we have investigated the processing of interaural temporal disparities (ITDs) conveyed within high-frequency auditory channels. Historically, ITD-processing at high frequencies has been found to be less ef cient than that measured at low frequencies. Using “transposed” stimuli, we have reported that ITD-processing at high frequencies can be enhanced in terms of resolution of ITDs, extents of ITD-based laterality and resistance to the binaural interference found with conventional high-frequency stimuli. Notably and of theoretical import, transposed stimuli provide envelope-based binaural information within high-frequency channels similar to that provided by the waveform within low-frequency channels. More recently, we have utilized “raised-sine” high-frequency stimuli to investigate which particular features of the envelopes of high-frequency waveforms foster enhanced ITD processing. Such raised-sine stimuli permit independent variation of the modulation frequency, modulation depth, and “dead-time/relative peakedness” of the envelope of a high-frequency waveform, while also suitably restricting its spectral content. It will be seen that an interaural correlation-based model including stages mimicking peripheral auditory processing can explain much of the patterning of the results.

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Additional Files

Published

2009-12-15

How to Cite

Bernstein, L. R., & Trahiotis, C. (2009). Assessing the processing of interaural temporal disparities within high frequency stimuli via manipulations of the temporal signatures of their envelopes. Proceedings of the International Symposium on Auditory and Audiological Research, 2, 93–102. Retrieved from https://proceedings.isaar.eu/index.php/isaarproc/article/view/2009-10

Issue

Vol. 2 (2009): Binaural Processing and Spatial Hearing

Section

2009/2. Perceptual measures and models of spatial hearing

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