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Tuned Silencer Using Adaptive Variable Volume Resonator
ISSN: 1946-4614, e-ISSN: 1946-4622
Published April 14, 2008 by SAE International in United States
Citation: Duan, C., "Tuned Silencer Using Adaptive Variable Volume Resonator," SAE Int. J. Passeng. Cars - Electron. Electr. Syst. 1(1):296-300, 2009, https://doi.org/10.4271/2008-01-0896.
In this study, an adaptive control mechanism is proposed to design a silencer applying variable volume resonator concept. Transfer matrix method is used to calculate the transmission loss and evaluate acoustic performance of the proposed mechanism. Effects of damping factor, area ratio of expansion chambers are examined first for a fixed double chamber resonator. Then a two-dimensional search scheme is developed to find optimal piston position that achieves maximum transmission loss with minimal effort. This study shows that the proposed adaptive silencer can efficiently attenuate noise when comparing with a conventional fixed resonator.