Title :
A neuromorphic sound localizer for a smart MEMS system
Author :
Van Schaik, André ; Shamma, Shihab
Author_Institution :
Sch. of Electr. & Inf. Eng., Sydney Univ., NSW, Australia
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 cochleas 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 :
VLSI; acoustic signal detection; analogue processing circuits; direction-of-arrival estimation; intelligent sensors; low-power electronics; microphones; microsensors; analog VLSI implementation; analog circuit; incoming sound direction; measurement results; microphone signal time difference; microphones; neuromorphic sound localizer; silicon cochlea; simulation; smart MEMS system; sound source azimuthal angle; transconductance amplifier; Acoustic noise; Acoustic sensors; Biomembranes; Circuits; Ear; Intelligent sensors; Micromechanical devices; Microphones; Neuromorphics; Sensor arrays;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206357
