A master thesis from Aalborg University
Locating Acoustic Sources with Multilateration: Applied to Stationary and Moving Sources
[Lokalisering af akustiske kilder: Anvendt på stationære og dynamiske kilder]
Author(s)
Term
4. term
Education
Publication year
2014
Submitted on
2014-06-04
Pages
76 pages
Abstract
The main topic of this report is locating acoustic sources. The underlying theory used to created the locating method, is based on multilateration, which uses multiple sensors and their TDOA (Time Difference Of Arrival) to estimate a unique position. The resulting method is able locate stationary sources as well as moving source, as long as an anechoic environment is used. A hardware platform has been developed to provide the possibility of online execution. The platform is based on a Raspberry Pi, a Wolfson Audio Card and a preamplifier circuit for the microphones. An issue with communication between the Raspberry Pi and the Wolfson Audio Card, limited the number of input channels to 2, instead of the 3 required 2D location. This confines the method to only determining the angle of the source, while using this platform.
Keywords
Documents
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