The present invention describes a method to shape and control acoustic and pressure waves through to the use of metasurfaces applied to the waves. In particular the present invention describes a method to make the use of metasurfaces, for long wavelength waves, like the sound and haptic waves, convenient and practical by up-converting to higher frequency the original signal. Ultrasonic waves reduce the size of the metastructures within the metasurfaces to become small enough to open new frontier in the control of acoustic and pressure waves. The metasurfaces can be made tunable to widen even more the possible applications for metasurface technologies.
