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Structural Acoustics & Vehicle Silencing
Ocean Acoustics
Sonar System Design and Analysis
Experimentation and Calibration
Acoustic Test Tank Facility
Ocean Acoustics
Sound propagation in the ocean affects the performance of active and passive sonars, offers unique means for inferring water column and sediment properties, and is the principle means for generating worldwide bathymetry maps.  At APS we conduct applied R&D in Ocean Acoustics for ONR, the Homeland Security Advanced Research Projects Agency and the Naval Undersea Warfare Center.

Our current focus is on the intricate relation of undersea sound propagation and the environment, with applications such as: the predictability of sonar system performance; remote oceanographic and atmospheric sensing; and opportunities to exploit predictable ocean waveguide distortions in sonar signal processors.  APS maintains a wide variety of academic and custom developed acoustic propagation tools featuring solutions based on ray acoustics, coupled normal modes, and wavenumber integration.  APS has developed computationally efficient models to predict wide area propagation, reverberation and signal excess for multistatic air ASW, off-shore surveillance and harbor security.

By way of example, under SBIR funding, APS developed a computationally efficient, broadband underwater sound propagation model for use in sonar tactical decision aids.  This modeling approach, which we have named FMAP (for Fast Multistatic Acoustic Propagation) is an innovative implementation of coupled normal modes theory, and allows for predictive sonar performance analysis as well as a computationally efficient engine for optimizing sonobuoy and environmental sensor distributions. 

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