National Acoustic Laboratories Library

Time delay estimation of acoustic tones under low SNR conditions (Record no. 2601)

MARC details
000 -LEADER
fixed length control field 01385nam a22001577a 4500
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control field OSt
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20160715152031.0
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fixed length control field 160715b xxu||||| |||| 00| 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency National Acoustic Laboratories
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Franklin, Stephen
245 ## - TITLE STATEMENT
Title Time delay estimation of acoustic tones under low SNR conditions
520 3# - SUMMARY, ETC.
Summary, etc This paper describes a novel approach for autonomously detecting and tracking aircraft in the vicinity of an unmanned aerial vehicle (UAV). The time difference of arrival (TDOA) of acoustic tones originating from distant aircraft are correlated between spatially distributed microphone pairs located onboard the UAV. The geometry of multiple microphone pairs then allows the elevation and azimuth of the approaching aircraft to be estimated, despite the high levels of narrow- and broadband noise emanating from the engine firing sequence, propeller, airflow over the microphones and mechanical vibration. The technique enables estimation of the signal at levels 20 dB below the broadband noise floor. Potential detection ranges in excess of 1 km are demonstrated when the signal processing is combined with careful suppression of the many noise sources onboard the UAV.
773 3# - HOST ITEM ENTRY
Title Acoustics 2015 Hunter Valley
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/413/p77.pdf?sequence=1&isAllowed=y">http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/413/p77.pdf?sequence=1&isAllowed=y</a>
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme Universal Decimal Classification
Koha item type Periodical publication

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