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

摘要

Rarn owl can detect the arrival time disparity of binaural input sound which is of the order of 10 mu s. We proposed that this hyperacuity for detection of the disparity is accomplished through a combination of two kinds of functional contributions. One comes from the functional structure of a neural unit for coincidence detection, and the other comes from a functional structure of a network constructed with the units. The network model of nucleus laminaris is made based on Jeffress' model. The hyperacuity has been achieved by positively including noises in the input signals.