The neural model of nucleus laminaris and integration layer accomplishing hyperacuity in sound location in the barn owl

Barn owl can detect the arrival time disparity of binaural input sound whic h is of the order of 10 mu s We proposed that this hyperacuity for detectio n of the disparity is accomplished through a combination of two kinds of fu nctional contributions. One comes from the functional structure of a neural unit for coincidence detection, and the other comes from a functional stru cture of a network constructed with the: units. The network model of nucleu s laminaris is made based on Jeffress' model. The hyperacuity has been achi eved by positively including noises in the input signals. (C) 1999 Elsevier Science B.V. All rights reserved.