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Smart Structure Active Sonar Echo Cancellation Using Frequency Scheduled Control

, 2007
Practical applications of smart structure technology to active acoustic noise control demand high performance at low cost. Typically, performance increases achieved by reducing control system latency are expensive. Furthermore, sonar echo cancellation is
Laurence R. Riddle, John J. Murray
core

The underwater environment - A fluctuating acoustic medium rich in marine life. Implications for active military sonar

, 2005
Naval operations are increasingly likely to take place in littoral waters, where sonar conditions are normally unfavourable. At the same time, there is a growing need to consider possible harm to marine life, particularly mammals, from sonar ...
McLaren, David +3 more
core

Waveguide Invariant Active Sonar Target Detection and Depth Classification in Shallow Water

, 2010
Reverberation and clutter are two of the principle obstacles to active sonar target detection in shallow water. Diffuse seabed backscatter can obscure low energy target returns, while clutter discretes, specific features of the sea floor, produce ...
Goldhahn, Ryan
core

Development and validation of a new ultrasound score (SONAR-7) for synovitis in psoriatic arthritis and axial spondyloarthritis. [PDF]