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Proceedings Paper

Noise control in a duct system with online-tuned shunted piezoeletric materials
Author(s): Dominik Niederberger; Stanislaw Pietrzko; Manfred Morari
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Paper Abstract

This paper presents an application of resonant piezoelectric shunt damping to reduce sound radiated by a clamped square aluminium plate. The plate is mounted in a duct system and excited by plane waves. The sound radiation of the plate is evaluated by measuring the volume velocity and radiated sound power. Results show a significant reduction of the radiated sound power, if the resonant shunt circuit is tuned around the first natural frequency of the plate. Additionally, the performance of the online-tuned resonant shunt for varying operating conditions is compared with a not online-tuned shunt. It is shown that the online-tuned shunt keeps optimal noise reduction for varying temperature.

Paper Details

Date Published: 29 July 2004
PDF: 9 pages
Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004);
Show Author Affiliations
Dominik Niederberger, Swiss Federal Institute of Technology, Zurich (Switzerland)
Stanislaw Pietrzko, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Manfred Morari, Swiss Federal Institute of Technology, Zurich (Switzerland)

Published in SPIE Proceedings Vol. 5386:
Smart Structures and Materials 2004: Damping and Isolation
Kon-Well Wang, Editor(s)

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