Modelling of time reversal for localized tactile feedback on displays

A study on local haptic feedback on panels by using a limited number of acoustic transducers is presented. Feasibility is discussed to enhance the time reversal (TR) technique [1] towards a virtual model-based calibration instead of an empirical. Reversibility of a structural elastic wave is used to refocus on arbitrary focal points. This enables producing a localized haptic interaction to a fingertip. The contribution includes the theoretical background, a simulation study and its empirical validation.