23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-8.5.2

THE ACTIVE NOISE CONTROL OF PROPELLER NOISE USING A MULTIPOLE SECONDARY SOURCE

M. Kusni
Institute of Teknology of Bandung, Indonesia

Keywords: active noise control, multipole source

The commercial feasibility of active noise control (ANC) is very promising due to its capability beyond passive noise control (PNC) and to some extend becomes a complement of PNC. The active noise reduction is also capable in reducing noise selectively. Of course, the mentioned above is not without a problem. The active noise reduction using a conventional secondary source can become to be very complicated when required a significant noise level reduction, because it is required a large number of secondary sources. The active noise reduction is also less effective for reducing a high-frequency noise. For that it has been developed a multipole secondary source enabling to solve with the problem mentioned above. And then the multipole secondary source will be used to conduct a numeric simulation of noise reduction in a free field for propeller noise source.

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