Activity: Talk or presentation › Conference presentation
Description
Ernst Chladni reported the accumulation of sand and particles to the nodal lines of transversely vibrating plate already in 1787. Following his ideas, even today many acoustic manipulation works focus on trapping objects at nodes, neglecting how the objects move before they reach the nodes. In this talk, we present our recent results [1] on modeling, predicting and controlling the motion of objects on a Chladni plate. By playing carefully selected sequences of musical notes – signals with finite duration and energy mostly around single frequency – we can control the position of multiple objects simultaneously and independently using a single acoustic actuator. In our method, the objects generally are not at the nodes. Our method allows independent trajectory following, pattern transformation and sorting of several different types of objects, including electronic components, water droplets on solid carriers, plant seeds, candy balls and metal parts. Our work is mainly experimental, supported by theory.