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date: 24 February 2020

Abstract and Keywords

Decades of research in human and animal auditory psychophysics have provided a theoretical framework for understanding brain mechanisms responsible for mediating these functional abilities. The precedence effect (PE) and binaural masking level difference (BMLD) are two effects that have been studied in depth in order to understand auditory mechanisms that enhance localization, detection, and perception of signals under complex listening situations. This article provides an overview of recent studies in the field of electrophysiology that potentially illuminate those processes by which perceptual effects are achieved. Physiological studies have been undertaken in areas of the brain that are known to mediate mechanisms responsible for sound localization abilities. The article summarizes the behavioral findings in these various species, which suggests that the PE is a robust phenomenon that exists in both mammalian and non-mammalian species. Further, it discusses evidence that physiological correlates of the PE, and its phenomena, have been discovered in the auditory systems of various species.

Keywords: precedence effect, binaural masking level difference, electrophysiology, auditory mechanisms, sound localization

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