Publications by authors named "Suyash Narendra Joshi"
Perceptual Weighting of Binaural Lateralization Cues across Frequency Bands.
J Assoc Res Otolaryngol
December 2020
The auditory system uses interaural time and level differences (ITD and ILD) as cues to localize and lateralize sounds. The availability of ITDs and ILDs in the auditory system is limited by neural phase-locking and by the head size, respectively. Although the frequency-specific limitations are well known, the relative contribution of ITDs and ILDs in individual frequency bands in broadband stimuli is unknown.
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- A computational model simulating cat auditory nerve fiber (ANF) responses to electrical stimulation is introduced, focusing on two sites of spike generation and the effects of both anodic and cathodic charges.
- The model represents the ANF as two interconnected neuron models, where the peripheral axon responds differently to charges than the central axon, showcasing variations in spike latencies.
- It incorporates adaptive feedback loops to address phenomena like facilitation and spike-rate adaptation, and can predict how changes in stimulation parameters affect neural responses, relevant for understanding cochlear implant performance.
The loudness of broadband sound is often modeled as a linear sum of specific loudness across frequency bands. In contrast, recent studies using molecular psychophysical methods suggest that low and high frequency components contribute more to the overall loudness than mid frequencies. In a series of experiments, the contribution of individual components to the overall loudness of a tone complex was assessed using the molecular psychophysical method as well as a loudness matching task.
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