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J Acoust Soc Am. 2017 Dec;142(6):EL573. doi: 10.1121/1.5017523.

Passive underwater acoustic markers using Bragg backscattering.

Author information

1
School of Mechanical Engineering, Georgia Institute of Technology, 771 Ferst Drive NW, Atlanta, Georgia 30332-0405, USA prakhar.hyd@gmail.com, bnichols8@gatech.edu, karim.sabra@me.gatech.edu.

Abstract

This letter demonstrates the feasibility of a passive underwater acoustic marker technology (or "AcoustiCode") for use in underwater navigation. An AcoustiCode tag is a planar surface with machined periodic patterns capable of producing Bragg backscattering beampatterns with engineered spatial and frequency variations, thus having a unique three-dimensional acoustic signature over a selected frequency band. Hence, these AcoustiCodes enable three-dimensional navigation and information signaling in a totally passive manner for existing high-frequency SONAR systems (potentially mounted on autonomous underwater vehicles), which naturally operate in a narrow frequency band and can also be used over significantly longer ranges compared to optically-based systems.

PMID:
29289111
DOI:
10.1121/1.5017523

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