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Abstract:
This paper presents an electronic system that extracts the
periodicity of a sound. It uses three analogue VLSI building
blocks: a silicon cochlea, two inner-hair-cell circuits and two
spiking neuron chips. The silicon cochlea consists of a cascade of
filters. Because of the delay between two outputs from the silicon
cochlea, spike trains created at these outputs are synchronous only
for a narrow range of periodicities. In contrast to traditional
band-pass filters, where an increase in selectivity has to be
traded off against decrease in response time, the proposed system
responds quickly, independent of selectivity.
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