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A Biomimetic Apparatus for Sound-source Localization Amir A. Handzel, Sean B. Andersson, Martha Gebremichael and P.S. Krishnaprasad
 

Summary: A Biomimetic Apparatus for Sound-source Localization
Amir A. Handzel, Sean B. Andersson, Martha Gebremichael and P.S. Krishnaprasad
Institute for Systems Research and Department of Electrical and Computer Engineering
University of Maryland, College Park, MD 20742, USA
{handzel,sanderss,krishna}@isr.umd.edu
Abstract-- Sound source localization systems are typically
made of free field microphone arrays. We recently proposed the
design of a localizing system based on the principles observed
in nature, where directional acoustic sensing evolved to rely
on diffraction about the head with only two ears. Localization
is performed using the resultant frequency dependent acoustic
phase and intensity differences between the two ears. These
interaural functions can be computed analytically by modeling
the head as a sphere. Now we report the first successful
implementation of these ideas in an artificial head with two
antipodally placed microphones. In order to determine source
direction, we define a suitable metric associated to interaural
functions. The true source direction is given by the global
minimum of the metric between a measurement and a table
of theoretical functions. The system was tested with a broad-

  

Source: Andersson, Sean B. - Department of Aerospace and Mechanical Engineering, Boston University

 

Collections: Engineering