The aim of this study is to clarify the mechanism of vortex-induced oscillation of bluff section which is related with the instability of separated shear around its body by wind. The investigation of vortex-induced oscillation for 2-D rectangular sections were performed by the way of shear layer instability stimulation by applied sound. Furthermore, geometrical shape and turbulence effects on the response characteristics of the vortex-induced oscillation of edge girder bridge sections were also investigated on the basis of applied sound.