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- W1680352246 abstract "Helmholtz resonator has been used, especially in intake and exhaust systems of vehicles, due to its good noise reduction characteristics at low frequencies. Many approaches have been developed to predict the acoustic behavior of the resonator with the assumption that there is no leakage from the resonator. However, its behavior may be affected by leakage which may exist in manufacturing processes or on purpose. This study investigates the effect of leakage on the noise reduction characteristics of Helmholtz resonator with two practical examples. One is a resonator with a gap between baffle and housing of the resonator and the other one is a resonator with two drain holes on the baffle. The measured transmission loss shows that the resonance frequencies are considerably shifted to higher frequency due to the leakage. The Boundary Element Method was applied to predict the transmission loss of the Helmholtz resonator with drain holes. The comparison between the measured and predicted transmission loss shows that the acoustic impedance of the holes is essential for accurate predictions of the transmission loss." @default.
- W1680352246 created "2016-06-24" @default.
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- W1680352246 date "2009-06-20" @default.
- W1680352246 modified "2023-10-16" @default.
- W1680352246 title "Effect of Leakage on the Noise Reduction Characteristics of Helmholtz Resonator" @default.
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- W1680352246 doi "https://doi.org/10.5050/ksnvn.2009.19.6.634" @default.
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