Broadband acoustic resonance dissolution spectroscopy
Broadband acoustic resonance dissolution spectroscopy (BARDS) is a technique in analytical chemistry. Developed in the late 2000s, it involves the analysis of the changes in sound frequency generated when a solute dissolves in a solvent, by harnessing the hot chocolate effect.
Source: Wikipedia — Broadband acoustic resonance dissolution spectroscopy (CC BY-SA 4.0)