Device-Free Gesture Tracking Using Acoustic Signals Wei Wangt Alex X.Liut Ke Sunt tNanjing University,Michigan State University MobiCom'16 Oct4h,2016 日+回1三1交非三勺风 1/20Device-Free Gesture Tracking Using Acoustic Signals Wei Wang† Alex X. Liu†‡ Ke Sun† †Nanjing University, ‡Michigan State University MobiCom’16 Oct 4th, 2016 1/20