An Acoustic Metamaterial Sensing Unit for Infrasound Direction of Arrival Determination.
Jerry W. Rouse, Daniel Bowman, Timothy S Walsh · 2021
SAND2021-3135CThis paper describes objective technical results and analysis.Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government.Outside Ch. 1 Ch. 2 Ch. 3 Ch. 4 Outside Ch. 1 Ch. 2 Ch. 3 Ch. 4 Ch. 1 Ch. 2 Ch. 4 Ch. 3 § Finite element model of sensor was constructed § Two dimensional with free-field boundary conditions § Channel response for single incidence angle shown § Channels resonate at 4.6 Hz and 14 Hz Channel Response vs Incidence Angle § Channel response predicted for a range of incidence angles § Results shown at 4.6 Hz and 14 Hz resonances § Unique relative response level for each incidence angle§ Allows for direction of arrival determination 8 ~12 dB Ch. 1 Ch. 2 Ch. 3 Ch. 4 Ch. 1 Ch. 2 Ch. 4 Ch. 3 Ch. 1 Ch. 2 Ch. 3 Ch. 4