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20 May 1996 Smart Plates for noise reduction using MEMS technology
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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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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