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Proceedings Paper

Sound pressure damping using piezoelectric membranes with negative capacitance circuits
Author(s): Jacob Kizer; Michael Fontaine; Umesh A Korde
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Paper Abstract

Piezoelectric membranes connected to negative capacitance circuits (NCC) are studied as a possible solution to damping acoustic loads. Two experiments are performed to test this theory. In the first experiment, a piezoelectric patch is stretched across an acoustic tube's cross section and connected to a NCC tuned to minimize the transmitted sound. Variable position microphones are used to measure sound pressure levels. The second experiment models a launch vehicle. Piezoelectric patches are used to enclose the inner payload chamber and isolate it from acoustic noise. Microphones are positioned both inside and outside the chamber to measure the noise reduction.

Paper Details

Date Published: 27 April 2011
PDF: 11 pages
Proc. SPIE 7977, Active and Passive Smart Structures and Integrated Systems 2011, 79770A (27 April 2011); doi: 10.1117/12.879784
Show Author Affiliations
Jacob Kizer, South Dakota School of Mines and Technology (United States)
Michael Fontaine, South Dakota School of Mines and Technology (United States)
Umesh A Korde, South Dakota School of Mines and Technology (United States)


Published in SPIE Proceedings Vol. 7977:
Active and Passive Smart Structures and Integrated Systems 2011
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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