Noise source detection and identification methods are used to determine the acoustic stealth of underwater vessels. All of the vessel's noise sources must be measured and identified, including on-board equipment, water flow across the hull or fins, cavitation of the propulsion system, personnel movement, and other sources of radiated noise. Sensors designed for applications of interior and exterior noise identification, noise and vibration monitoring, noise level assessments, and acoustic pressure sensor arrays all require some degree of protection for their intended use near or under water...