Mitigation of acoustic resonance using electrically shunted loudspeakers

Andrew J. Fleming; Dominik Niederberger; S. O. Reza Moheimani; Manfred Morari

doi:10.1117/12.659022

15 March 2006 Mitigation of acoustic resonance using electrically shunted loudspeakers

Andrew J. Fleming, Dominik Niederberger, S. O. Reza Moheimani, Manfred Morari

Proceedings Volume 6169, Smart Structures and Materials 2006: Damping and Isolation; 616918 (2006) https://doi.org/10.1117/12.659022
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

Low-frequency reverberant sound fields are usually suppressed by means of either adaptive feedforward control or Helmholtz resonator. In this paper, an electrical impedance is connected to the terminals of an acoustic loudspeaker, the mechanical dynamics, and hence acoustic response can be made to emulate a sealed acoustic resonator. No microphone or velocity measurement is required. In some cases, the required electrical circuit is simply the parallel connection of a capacitor and resistor. Experimental application to a closed acoustic duct results in 14 dB pressure attenuation of a single acoustic mode.

Citation Download Citation

Andrew J. Fleming, Dominik Niederberger, S. O. Reza Moheimani, and Manfred Morari "Mitigation of acoustic resonance using electrically shunted loudspeakers", Proc. SPIE 6169, Smart Structures and Materials 2006: Damping and Isolation, 616918 (15 March 2006); https://doi.org/10.1117/12.659022

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