Abstract
The coupling of airborne sound into roadways and desert soils has been significantly investigated for the purposes of locating buried antitank (AT) landmines. However, there has been relatively little acoustic-to-seismic (A/S) coupling data collected for the purpose of buried antipersonnel (AP) landmine detection. A/S coupling landmine research has typically been accomplished with a low frequency sound source radiating pseudo-random noise in the frequency range 0f 80-300 Hz and a scanning single beam laser Doppler vibrometer (LDV) with a 10 cm beam spacing. The single beam LDV is operated in a serial data collection procedure resulting in long scan times. Recently, a data collection platform that uses 16 LDVs has been used to detect buried AT landmines. In the work reported here, this data collection platform is used to scan a significant number of AP landmines. For this purpose, the LDV beam spacing is reduced to 3 cm and the upper frequency of the sound source is increased to 2 KHz.
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