Toward An Improved Model Of Auditory Saliency
Bregman, Albert S.
Cooperstock, Jeremy R.
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While visual saliency models are approaching maturity, their auditory counterparts remain in their infancy. This is mainly due to the difficulties of gathering basic data, and oversimplifications such as an assumption of monaural signals. Moreover, conventional testing approaches for evaluating auditory saliency models tend to be overly simplistic. To address these shortcomings, we developed an experimental procedure for testing auditory saliency along with more formalized stimulus-selection criteria to support more versatile and ecologically relevant saliency models. This work is described, along with an analysis of some relevant acoustical correlates that emerge from the experiments. The results motivate the formulation of a measure of sound complexity and appear to favor time-domain, rather than frequency-domain analysis to describe saliency. Finally, some conclusions are drawn regarding the definition of an expanded feature set to be used for auditory saliency modeling and prediction in the context of natural, everyday sounds.