National Technology & Engineering Solutions of Sandia, LLC

California Institute of Technology

Daniel Bowman

Jerry W Rouse

Attila Komjathy

Timothy Walsh

James Cutts

Siddharth Krishnamoorthy

Various embodiments described herein provide for a balloon-borne aeroseismometer that can detect infrasonic signals and concurrent vibrations caused by the infrasonic signals. Through a set of motion sensors that can detect acceleration in three planes, the aeroseismometer can determine the direction of vibration and thus determine a travel path of the infrasonic signal relative to the aeroseismometer. The aeroseismometer can also translate the direction of the source from a reference frame of the aeroseismometer to an external reference frame, such as a planetary coordinate system, in order to identify potential locations of a source of the infrasonic signals.

Geolocating sources of acoustic signals with a balloon-borne aeroseismometer

A method and apparatus for determining a direction of infrasound. Infrasound is received by a directional infrasound sensor comprising a plurality of channels and a plurality of sensor devices. Each channel in the plurality of channels comprises a single opening at a first end of the channel and a closed end opposite the opening. The opening of each channel in the plurality of channels is pointed in a different direction from the opening of each other channel in the plurality of channels. The plurality of sensor devices includes a sensor device at the closed end of each channel in the plurality of channels. Each sensor device in the plurality of sensor devices is configured to generate a sensor signal in response to pressure. The sensor signals generated by the plurality of sensor devices are processed to determine the direction of the infrasound received by the directional infrasound sensor.

Directional infrasound sensing

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Albuquerque, NM, United States of America

Daniel Bowman