Active Control of Sound Transmission Trough a Double Wall Structure

Abstract:

Based on coupling structural-acoustic modal model, using piezoelectric materials and loudspeaker/microphones as actuator/sensors, the analytical simulations are presented for the actively controlled the sound transmission through double plate structure. Firstly, the results show the potential for using PVDF sensors to improve sound transmission loss. Secondly, the effects of parameters of actuator/sensor and double plate structure on control performances are discussed. And some useful conclusions are obtained, for example, if volume velocity sensor is applied to radiating plate, transmission loss will improve significantly, no matter what type actuators (i.e. loudspeakers or PZT actuators on either plate) are used; symmetrical rectangular PVDF sensors should be applied on radiating plate; using loudspeaker/microphone configuration should be avoided for the same thickness double plate structure; the increased thickness of cavity leads to the better control performance.

• Periodical: Applied Mechanics and Materials (Volumes 138-139)
• Pages: 858-863
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.138-139.858
• Online since: November 2011
• Authors: Qi Bo Mao
• Keywords: Active Noise Control, Double Wall Structure, Sound Transmission Loss

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