منابع مشابه
Active Control of Sound for Composite Regions
We present a methodology for the active control of time-harmonic wave fields, e.g., acoustic disturbances, in composite regions. This methodology extends our previous approach developed for the case of arcwise connected regions. The overall objective is to eliminate the effect of all outside field sources on a given domain of interest, i.e., to shield this domain. In this context, active shield...
متن کاملOptimization in the Context of Active Control of Sound
A problem of eliminating the unwanted time-harmonic noise on a predetermined region of interest is solved by active means, i.e., by introducing the additional sources of sound, called controls, that generate the appropriate annihilating signal (anti-sound). The general solution for controls has been obtained previously for both the continuous and discrete formulation of the problem. Next, the c...
متن کاملQuadratic Optimization in the Problems of Active Control of Sound
We analyze the problem of suppressing the unwanted component of a time harmonic acoustic eld noise on a predetermined region of interest The suppression is rendered by active means i e by introducing the additional acoustic sources called controls that generate the appropriate anti sound Previously we have obtained general solutions for active controls in both continuous and discrete formulatio...
متن کاملActive control of sound with variable degree of cancellation
We formulate and solve a control problem for the field (e.g., time-harmonic sound) governed by a linear PDE or system on a composite domain in Rn. Namely, we require that simultaneously and independently on each subdomain the sound generated in its complement be attenuated to a desired degree. This goal is achieved by adding special control sources defined only at the interface between the subd...
متن کاملActive Control of Sound Transmission into Three-dimensional Enclosures
Title of Dissertation: ACTIVE CONTROL OF SOUND TRANSMISSION INTO THREE-DIMENSIONAL ENCLOSURES Moustafa Al-Bassyiouni, Doctor of Philosophy, 2004 Dissertation directed by: Professor B. Balachandran Department of Mechanical Engineering The aim of this dissertation work is to understand active control of sound fields inside a three-dimensional rectangular enclosure into which noise is transmitted ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1988
ISSN: 0001-4966
DOI: 10.1121/1.2026019