8 September 1993 Wave-number sensors for active control of acoustic radiation
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A number of problems in active noise control involve the attenuation of noise radiated from vibrating structures. Although one could conceivably minimize the radiation by minimizing the vibration of the structure, it has been demonstrated that one can often minimize the radiation without any significant reduction in the vibration levels on the structure. Such an approach is attractive, in that it often reduces the control authority which is required for the control actuators. However, to implement such an approach, it is necessary to sense the structural vibration in a manner which allows one to determine the acoustic radiation. This paper outlines a method to sense the acoustic radiation from a structure, using distributed sensors. The approach is based on estimating the wavenumber spectrum associated with the vibrating structure, from which the acoustic radiation can be determined. Some of the difficulties in implementing the method for typical acoustic problems are addressed, along with possible approaches for overcoming some of these difficulties.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Scott D. Sommerfeldt and Brian L. Scott "Wave-number sensors for active control of acoustic radiation", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152795; https://doi.org/10.1117/12.152795

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