研究进展一 声波在不同介质中的传播差异 Top Mic (Mic 2) Back Surface Path 4 of the Phone ·利用双麦克风接收手指反射声音的到达时 Path 2 间差异，分析手指触摸的位置 Path 5 -、Pah3 Structure path- Rear Speaker ·利用声音在空气与手机壳中传播的速度差 Path 1 LOS air path - 月eflection air path-,-+ Bottom Mic (Mic 1) 异，分析手指触摸的位置 ×10 15 x10 +←Pah1 and Path3 301,22510的 10 日3.1.7x0与 -Path 6 ←Path5 257 513 769 256 512 766 102 Samples Samples (a)Bottom microphone(Mic 1) (b)Top microphone (Mic 2) [1]Ke Sun,Ting Zhao,Wei Wang,Lei Xie,VSkin:Sensing Touch Gestures on Surfaces of Mobile Devices Using Acoustic Signals,in Proceedings of the 24th Annual International Conference on Mobile Computing and Networking,2018ei~:5W0+w`K;? • mʀƘbƔßäÙ݁³¡ƒĚoűé Ƅ¹Ä5jøÙÝŘâĚmŃ • mĘ¡ƒšĩćVÙõ¢>kãĚŻÀ¹ Ä5jøÙÝŘâĚmŃ [1] Ke Sun, Ting Zhao, Wei Wang, Lei Xie, VSkin: Sensing Touch Gestures on Surfaces of Mobile Devices Using Acoustic Signals, in Proceedings of the 24th Annual International Conference on Mobile Computing and Networking, 2018