Related Experiment Video
Updated: Jun 23, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Decentralized harmonic control of sound radiation and transmission by a plate using a virtual impedance approach
Nicolas Quaegebeur1, Philippe Micheau, Alain Berry
1Department of Mechanical Engineering, GAUS, Universite de Sherbrooke, 2500 Boulevard Universite, Sherbrooke, Quebec J1K 2R1, Canada. nicolas.quaegebeur@gmail.com
Abstract:
The problem under study in this article is the active control of sound transmission and radiation of a panel under a periodic excitation. The control strategy investigated uses independent control loops between an individual polyvinylidene fluoride (PVDF) sensor and an individual lead zirconate titanate (PZT) actuator. The specific approach employed here uses the concept of virtual impedance. The aim is to determine for each frequency the optimal impedance between each PVDF sensor and the corresponding PZT actuator in order to reduce the sound power radiated by the plate. Theoretical predictions are compared to measurements of the sound radiated and transmission loss of a panel mounted with eight PZT-PVDF units. Reductions of up to 20 dB of the acoustic power can be achieved around mechanical resonances of the system, while the control strategy has little effect for off-resonance excitations.
Related Concept Videos
Time and frequency -Domain Interpretation of PI Control
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires careful...
Parallel Resonance
Time and frequency -Domain Interpretation of Phase-lead Control
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
Mesh Analysis for AC Circuits
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Frequency-Domain Interpretation of PD Control
The proportional control gain, combined with the system's...
Sound Waves: Interference