Using low frequency sound will agitate the solute and solvent, speeding up the natural cold brew process. Using ultrasonic will do it even faster, but since ul

Using low frequency sound will agitate the solute and solvent, speeding up the natural cold brew process. Using ultrasonic will do it even faster, but since ultrasonic underwater induces cavitation bubbles, it's much more violent. Ultrasonic has been used for dermal infusion quite successfully, but it is....painful, as bubbles are exploding against your skin. I would presume the same to be for the sonic coffee. Agitation speeds up the process, until cavitation occurs, where it becomes more violent