Control of enclosed sound fields using shunted piezoelectric circuits

M. Al Bassyiouni; B. Lester; B. Deleon; S. Edmonds; S. Hoidra; K. Wroblewski

doi:10.1117/12.645062

27 March 2006 Control of enclosed sound fields using shunted piezoelectric circuits

M. Al Bassyiouni, B. Lester, B. Deleon, S. Edmonds, S. Hoidra, K. Wroblewski

Proceedings Volume 6166, Smart Structures and Materials 2006: Modeling, Signal Processing, and Control; 61661K (2006) https://doi.org/10.1117/12.645062
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

In this article, the modeling and control of enclosed sound fields using shunted piezoelectric circuit is investigated. A spherical wave, which is generated by a noise source located in the near field, is transmitted into a rectangular enclosure through a flexible panel. Piezoelectric patches, which are bonded symmetrically to the top and bottom surfaces of the panel, are either shunted through electric shunt circuits, and hence acting as energy dissipaters, or used as sensors for vibration measurements. Microphone sensors are used inside and outside the enclosure for acoustic pressure measurements. The shunted circuits are developed such that the acoustical effects of two dominant vibration modes can be attenuated, and this feature makes it appealing for noise control schemes for multiple tones. The numerical predictions of the noise attenuation levels are found to be in good agreement with the corresponding experimental measurements.

Citation Download Citation

M. Al Bassyiouni, B. Lester, B. Deleon, S. Edmonds, S. Hoidra, and K. Wroblewski "Control of enclosed sound fields using shunted piezoelectric circuits", Proc. SPIE 6166, Smart Structures and Materials 2006: Modeling, Signal Processing, and Control, 61661K (27 March 2006); https://doi.org/10.1117/12.645062

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