Underwater and Physical Acoustics for the 21st Century

John S. Allen III

Department of Mechanical EngineeringUniversity of Hawai’i-Manoa

August 20, 2015

Harbor Acoustic Monitoring – Kilo Nalu Deployments – 2010, 2011

Boat, Diver Tracks Array, Rebreather Divers

AUV- Acoustic Detection and Tracking

REMUS-100 (Hydroid, Woods Hole, MA)

Small ship

GPS Track

REMUS Modem

Narrow Band Beam Forming ~(1065 Hz)

Cross Correlation

Acoustic Small Boat Localization JASA-EL, 2013, JASA, 2015

Future Research Directions – ARL

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5:30 AM6:15 AM7:00 AM

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tivar

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entro

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Drones – Optical, Infrared, Hydrophones Ambient Noise – Diurnal Spectral Changes (real time)

Detection in Clutter – Multiscale Entropy

Ice Fracture and AcousticEmissions

Infrared Thermography