1/4/2024 0 Comments Auditory illusions in songs![]() ![]() ![]() The common aspect of this illusion is that, when the noise is sufficiently loud and shares spectral content with the interrupted signal, listeners perceive the signal as continuous and uninterrupted. The continuity illusion can be elicited when noise interrupts a variety of sounds including: tones, frequency glides, and sentences (Bregman, 1990 Warren, 2008) complex tones Plack and White ( 2000) and sound textures (McWalter and McDermott, 2019). A perceptual illusion that sheds light on dynamic processing of multiple sounds is the auditory continuity illusion (Bregman, 1990) (also called temporal induction Warren, 2008). How do listeners in crowded and noisy environments create stable auditory streams in the face of interruptions and “background” noise? How do listeners identify the stops and starts of overlapping and interwoven sounds to correctly parse an auditory scene? Answering these questions is fundamental to understanding auditory perception and neural processing of sounds. ![]() Our findings can help guide future studies of neural correlates of this illusion and inform development of more biophysically-based models of the auditory continuity illusion. ![]() By grounding these notions in a quantitative model that incorporates elements of neural circuits (recurrent excitation, and mutual inhibition, specifically), we identify plausible mechanisms for the continuity illusion. Finally, we combine these input types together to obtain neural dynamics consistent with two requirements for the continuity illusion as articulated in a well-known theory of auditory scene analysis: responses persist through the noise-filled gap if noise provides sufficient evidence that the tone continues and if there is no evidence of discontinuities between the tones and noise. Second, we show that transient inputs and bistable dynamics (coexistence of two stable firing rate levels) can also produce continuous responses. First, we show that sustained inputs and hysteresis dynamics (a mismatch between tone levels needed to activate and inactivate the population) can produce continuous responses. We construct an idealized firing rate model of a neural population and analyze the conditions under which firing rate responses persist during the interruption between the two tones. In this work we provide a dynamical systems framework, grounded in principles of neural dynamics, to explain the continuity illusion. Conceptual explanations of this illusion have been proposed, but its neural basis is still being investigated. This illusion probes the conditions under which listeners link related sounds across time and maintain perceptual continuity in the face of sudden changes in sound mixtures. In the auditory continuity illusion, two brief tones separated by a silent gap may be heard as one continuous tone if a noise burst with appropriate characteristics fills the gap. Published on 5.Illusions give intriguing insights into perceptual and neural dynamics. Maruthi Chandrasekaran (Keyboards, Guitars)ĭream Theater, Porcupine Tree, Opeth, Steven Wilson, Rush, Cannibal Corpse, Eric Johnson Venus Isle, Pink Floyd, Riverside, Bobby McFerrin Auditory Illusion’s tracks 1. Fueled by never-ending email conversations, chaotic Google hangouts and 10-hour-long car journeys, Auditory Illusion intends to draw inspiration from any conceivable genre of music (except dubstep - don't go there!) and brings together a diverse group of musicians to create eclectic music which is like Baskin Robbins - there's something for everyone! Started by keyboardist/producer/self-designated temperamental brat Maruthi and bassist/carnivore Nikil, Auditory Illusion is a collaborative project that scoffs at conventional geographical barriers of distance. Play an instrument? Have an internet connection? Have a home recording setup and are looking for other musicians to work with? ![]()
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