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http://dx.doi.org/10.7776/ASK.2009.28.8.806

Study on Sound Reflection Control using an Active Sound Absorber  

Chang, Woo-Suk (LIG넥스원 Maritime 연구센터)
Gweon, Dae-Yong (LIG넥스원 Maritime 연구센터)
Publication Information
The Journal of the Acoustical Society of Korea / v.28, no.8, 2009 , pp. 806-814 More about this Journal
Abstract
This paper reviews a study about sound reflection control using an active sound absorber. An active sound absorber includes sound transmitting and receiving piezocomposite sensor layers molded by water tight epoxy, and connected with a feedback controller. The multi-layer sensors and the controller consists a closed feedback loop, whose intrinsic characteristics shows excellent impedance matching performance within specified frequency band, and consequently, minimizes reflection waves. Multilayer sound transmission model is derived based on one dimensional model, and its performance is verified with experiment using a pulse tube setup.
Keywords
Active Sound Absorber; Feedback Control; Piezocomposite; Acoustic Reflection;
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