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Mitigation of Acoustic Resonance using Electrically Shunted Loudspeakers

Author(s):

A. Fleming, D. Niederberger, S.O.R. Moheimani, M. Morari
Conference/Journal:

San Diego, USA, SPIE's Annual International Symposium on Smart Structures and Materials, vol. 6169, no. 616918-1
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.

Year:

2006
Type of Publication:

(01)Article
Supervisor:



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% Autogenerated BibTeX entry
@Article { FleEtal:2006:IFA_2253,
    author={A. Fleming and D. Niederberger and S.O.R. Moheimani and M. Morari},
    title={{Mitigation of Acoustic Resonance using Electrically Shunted
	  Loudspeakers}},
    journal={SPIE's Annual International Symposium on Smart Structures
	  and Materials},
    year={2006},
    volume={6169},
    number={616918-1},
    pages={},
    month=feb,
    url={http://control.ee.ethz.ch/index.cgi?page=publications;action=details;id=2253}
}
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