Active Control of Sound Transmission Into Three-Dimensional Enclosures

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 through a flexible boundary. To this end, analytical and numerical studies have been conducted. In the modeling efforts, a spherical wave excitation, which is generated by a noise source located in the near field of the flexible panel, is considered. Piezoelectric patches, which are bonded symmetrically to the top and bottom surfaces of the panel, are used as actuators. Microphones located inside and outside the enclosure serve as pressure sensors. The efforts account for panel interactions with both the external sound field…

Author: Al-Bassyiouni, Moustafa

Source: University of Maryland

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