Source Localization Using Acoustic Vector Sensors
Joshua York Independant Study
Washington University Spring 2009
Abstract

Abstract and Project Overview

Washington University Spring 09'

An acoustic vector sensor (AVS) measures all the three components of the acoustic particle velocity and the pressure at a single point in space. Through real experiments, the study evaluated the advantages of AVS for source localizing problems, compared with standard pressure sensor arrays. For this aim, we built a linear array of four AVS and design a graphical user interface for processing the measurements and estimating the source location in 3D. This research considered the source identifiability using a single AVS, as well as 3D location estimation using a linear array of AVS.

Overview

This research was conducted over the Spring semester at Washington University by Joshua York to fullfill the course requiremtns of ESE 500 Independant Study. The project was overseen by Dr. Arye Nehorai of the Washington University Department of Electrical and Systems Engineering with the additional contributions of Ed Richter and Patricio La Rosa.

The goal was to estimate the position or direction of an acoustic source using spatial and temporal measurements of pressure and particle acoustic field. An additional goal was to explore the use of Acoustic Vector Sensor(AVS) technology in a similar setting to that of the previous experiment in acoustic source localization using a four microphone array. This research utilizes equipment graciously loaned to our team by Microflown Technologies, consisting of 4 Acoustic Vector Sensors and the required signal conditioning devices. The goal is to explore the concept of source identification in 3D for specific frequencies. To accomplish these goals concepts in beam forming as well as acoustic mechanics have been explored.

This Web Site

Contained within this web site is the full body of research and results obtained from the course study. The navigation to the left will guide the reader through the topics of the presented research. Although the topics are meant to be followed in the order they are presented within the menu, the reader is invited to navigate the pages as they see fot to do so. As the research is continued through additional semsters, the information will obviously be updated to reflect new ideas and realizations. We thank you for your interest in this topic and hope you enjoy.

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