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Active control of sound. (English) Zbl 0988.76091
Annu. Rev. Fluid Mech. 32, 137-164 (2000).
Summary: We describe the physical principles underlying the control of sound, and review their application in a wide range of contexts. One scenario involves the control of noise from a primary source by the introduction of secondary sources, and this technique is described for fields in ducts, in free space, in enclosures (with particular reference to aircraft cabins), and for turbomachinery. A second scenario involves the use of the active control of sound to eliminate large-scale oscillations in more complicated flows, in which part of an unstable feedback cycle is mediated via acoustic waves. Successful applications of this idea include the control of combustion instabilities and compressor surge.
For the entire collection see [Zbl 0944.00031].

MSC:
76Q05 Hydro- and aero-acoustics
76N25 Flow control and optimization for compressible fluids and gas dynamics
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