A Neuromorphic Sound Localizer for a Smart MEMS System: ISCAS 2002 Special Issue on Smart Sensors (Guest Editors: Orly Yadid-Pecht and Ralph Etienne-Cummings)

Authors: van Schaik A.¹; Shamma S.²

Source: Analog Integrated Circuits and Signal Processing, Volume 39, Number 3, June 2004 , pp. 267-273(7)

Publisher: Springer

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Abstract:

In this paper we present an analog circuit that determines the direction of incoming sound using two microphones. The circuit is inspired by biology and uses two silicon cochlea to determine the azimuthal angle of the sound source with respect to the axis of the two microphones using the time difference between the two microphone signals. A new algorithm, adapted to an analog VLSI implementation, is presented together with simulation and measurement results.

Keywords: sound localization; neuromorphic; analog VLSI; silicon cochlea; zero-crossing detector

Document Type: Research article

DOI: http://dx.doi.org/10.1023/B:ALOG.0000029662.37528.c7

Affiliations: 1: School of Electrical and Information Engineering, University of Sydney, Sydney, NSW 2006, Australia., Email: andre@ee.usyd.edu.au 2: Institute for Systems Research, University of Maryland, College Park, MD 20742, USA

Publication date: 2004-06-01