Smart Plates for noise reduction using MEMS technology

Vasundara V. Varadan; Vijay K. Varadan; Xiao-Qi Bao

doi:10.1117/12.240448

20 May 1996 Smart Plates for noise reduction using MEMS technology

Vasundara V. Varadan, Vijay K. Varadan, Xiao-Qi Bao

Proceedings Volume 2722, Smart Structures and Materials 1996: Smart Electronics and MEMS; (1996) https://doi.org/10.1117/12.240448
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

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.

Citation Download Citation

Vasundara V. Varadan, Vijay K. Varadan, and Xiao-Qi Bao "Smart Plates for noise reduction using MEMS technology", Proc. SPIE 2722, Smart Structures and Materials 1996: Smart Electronics and MEMS, (20 May 1996); https://doi.org/10.1117/12.240448

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