DocumentCode :
2587208
Title :
Acoustic detection of low flying aircraft
Author :
Nielsen, Richard O.
Author_Institution :
Boeing Co., Anaheim, CA, USA
fYear :
2009
fDate :
11-12 May 2009
Firstpage :
101
Lastpage :
106
Abstract :
A passive acoustic system, consisting of a set of acoustic nodes and a central processing node, is a good candidate for the covert detection of low flying aircraft as they cross our nation´s borders. Small arrays of microphones have been used to estimate aircraft speed, heading, frequency spectrum and altitude at the closest point of approach. We extend this work by considering maneuvering aircraft and by testing a narrowband algorithm that gives angle estimates sooner, and over a longer period of time, than the broadband version. A new narrowband algorithm is provided for estimating position versus time as the aircraft flies through a grid of widely spaced omni-directional microphones (separated by several miles). We classify aircraft as helicopter, piston engine aircraft (specifically, numbers of propeller blades and cylinders), turboprop aircraft or jet aircraft. Our approach has been validated via testing at various airports against ground truth data.
Keywords :
acoustic signal detection; aerospace instrumentation; helicopters; acoustic nodes; angle estimation; central processing node; low flying aircraft acoustic detection; microphone array; narrowband algorithm testing; Acoustic signal detection; Aircraft propulsion; Engines; Frequency estimation; Helicopters; Microphone arrays; Narrowband; Pistons; Propellers; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Technologies for Homeland Security, 2009. HST '09. IEEE Conference on
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-4178-5
Type :
conf
DOI :
10.1109/THS.2009.5168021
Filename :
5168021
Link To Document :
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