Huh, interesting device: https://en.wikipedia.org/wiki/Thermoacoustic_heat_engine https://en.wikipedia.org/wiki/Thermoacoustic_heat_engine Is this actually a t

Huh, interesting device: https://en.wikipedia.org/wiki/Thermoacoustic_heat_engine https://en.wikipedia.org/wiki/Thermoacoustic_heat_engine Is this actually a thermo-acoustic engine, or some other kind of sterling engine? Or are they equivalent? The article doesn't seem to mention "acoustic" (or an equivalent).