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Modified JMC Method in Active Control of Sound

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The JMC method, developed by Jessel, Mangiante and Canévet, is applied in the active control of sound, mostly by using the scalar-weighting factor, in which all the first-order field and source quantities are weighted with the same weighting factor. A modified JMC method is developed for the basis of new concepts, the vector and dyadic weighting, the former weighting the sound pressure and particle velocity independently, and the latter also changing the polarization (or direction) of the particle velocity. The main advantage of the modification of the JMC method is that the original sources remain unchanged in all cases, the situation being thus more similar to a practical one. Theoretical possibilities of general field modifications and optimization of secondary sources, based on these new field reshapers, are presented.
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Document Type: Research Article

Publication date: 01 January 1997

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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