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Proceedings Paper

Smart Plates for noise reduction using MEMS technology
Author(s): Vasundara V. Varadan; Vijay K. Varadan; Xiao-Qi Bao
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Paper Abstract

Active sound transmission control using MEMS sensor and actuator on a thin plate is investigated experimentally. The plate made of aluminum covers the opening of an acoustic enclosure where a sound source is located. The outside acoustic field is measured by a microphone array, which scans a hemispherical surface. The isolation performance of the original plate is poor at its resonance frequencies. The sound transmission through the plate is actively controlled at the resonance frequencies. A one-sensor one-actuator control system minimizes the sensor output by applying a proper electric voltage to the actuator. Global sound reductions of 15 - 22 dB are achieved at the first three resonance frequencies by using same sensor and actuator.

Paper Details

Date Published: 20 May 1996
PDF: 11 pages
Proc. SPIE 2722, Smart Structures and Materials 1996: Smart Electronics and MEMS, (20 May 1996); doi: 10.1117/12.240448
Show Author Affiliations
Vasundara V. Varadan, The Pennsylvania State Univ. (United States)
Vijay K. Varadan, The Pennsylvania State Univ. (United States)
Xiao-Qi Bao, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 2722:
Smart Structures and Materials 1996: Smart Electronics and MEMS
Vijay K. Varadan; Paul J. McWhorter, Editor(s)

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