Abstract:

Fiber-optic sensors under development for structural-acoustics applications will be discussed. These applications include the structural-acoustic monitoring and control of submarine and air-frame systems. In both cases, the ``structure'' is more or less cylindrical in shape, and the goal is to apply sensors to the structure, ideally, acoustic pressure and velocity sensors, but in some cases strain sensors, so as to be able to ``know'' through the application of suitable algorithms the exterior sound field (in the submarine case) or the interior noise field (for the air-frame system). In addition to the details of the particular fiber sensors, which have been successfully developed, a view will be presented as to what new and improved sensors are required for these applications. [Work supported by the Office of Naval Research.]