An Acoustic Metamaterial Sensing Unit for Infrasound Direction of Arrival Determination
Session: Infrasound and the Seismo-Acoustic Wavefield II
Type: Oral
Date: 4/21/2021
Presentation Time: 10:15 AM Pacific
Description:
We present the design and simulated performance of a single-unit infrasound microbarometer that leverages acoustic metamaterial technology to achieve direction of arrival sensing capability. Acoustic metamaterials are specialized configurations of resonators that permit subwavelength-scale units to capture sound wavefields without the need for spatially extensive arrays. We show the simulated performance of the unit, which consists of channels and pressure sensors occupying a small footprint relative to a wavelength. We suggest that this technology could replace current decimeter to kilometer scale infrasound microbarometer arrays with a single station. This is particularly useful in harsh, access-controlled environments or where space is at a premium. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.
Presenting Author: Jerry W. Rouse
Student Presenter: No
Authors
Jerry Rouse Presenting Author Corresponding Author jwrouse@sandia.gov Sandia National Laboratories |
Daniel Bowman dbowma@sandia.gov Sandia National Laboratories |
Timothy Walsh tfwalsh@sandia.gov Sandia National Laboratories |
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An Acoustic Metamaterial Sensing Unit for Infrasound Direction of Arrival Determination
Category
Infrasound and the Seismo-acoustic Wavefield