According to the company, the thermo-acoustic chiller pumps sound waves from a speaker, thereby raising and lowering pressure of helium inside. This allows it to pull heat out of the ice cream in an attached freezer. Plans call for hundreds of the devices to be in place in company stores within several years.
High-powered sound waves and helium gas are expected to keep the ice cream hard, and the technology has the potential to heat and cool homes. Any such residential aspirations are at least five to 10 years in the future, however.