Abstract
Behavioral field studies involving playback of natural and synthetic calls indicate that anurans (frogs and toads) respond selectively to the calls of their own species. Furthermore they can localize a sound source with remarkable accuracy (despite the relatively small interaural distance between their eardrums). Electrophysiological studies reveal that their peripheral auditory system is tuned to the spectral and temporal features in their species-specific calls, and that their ear is directionally sensitive. Recordings from central auditory nuclei verify a hierarchical organization in encoding complex sounds of biological significance as well as the existence of binaural interaction subserving sound localization. These studies of anurans serve as a model for neural processing in the auditory systems of higher vertebrates. [Supported by NIH Grant NS-09244.]
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