An Acoustic Metamaterial Sensing Unit for Infrasound Direction of Arrival Detection

Session: Innovative Seismo-Acoustic Applications to Forensics and Novel Monitoring Problems [Poster]
Type: Poster
Date: 4/29/2020
Time: 08:00 AM
Room: Ballroom
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.

Presenting Author: Jerry W. Rouse

Authors