Skinput provides a new input technique based on bioacoustic sensing technology that allows the skin to be used as a finger input surface. When a finger taps on the skin, the impact creates acoustic signals, which can be captured by a bioacoustic sensing device. Variations in bone density, size and the different filtering effects created by soft tissues and joints, create distinct acoustic locations of signals, which are sensed, processed and classified by software. Interactive capabilities can be linked to different locations on the body.