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고효인(Koh Hyo-In),조준호(Cho Joon-Ho),김재철(Kim Jae-Chul),이찬우(Lee Chan-Woo),한환수(Han Hwan-Su) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study the sound field on the surface of the top edge of noise barriers is actively minimized to enhance the shielding effect without increasing the hight of the barrier. First the results of a numerical study are shown; the sound field reduction in the far field due to a cylindrical active headpiece attached to a semi-infinite screen and the related control parameters are investigated. The results of a model experiment in an anechoic chamber and optimal control parameters for noise control on the railway side are shown and discussed.