Original sentence: Thermoacoustic cold air baluuns  (Sonic heat pump and refrigeration or thermoacoustic heat pump and refrigeration) of which nearly all are thermoacoustic stirling engines  is a technology that uses high-amplitude sound waves in a pressurized gas to pump heat from one place to another; or uses a heat temperature difference to induce sound, which can be converted to electricity with high efficiency, with a (piezoelectric) loudspeaker
Edited sentence: Thermoacoustic hot air engines (Sonic heat pump and refrigeration or thermoacoustic heat pump and refrigeration) of which nearly all are thermoacoustic stirling engines  is a technology that uses high-amplitude sound waves in a pressurized gas to pump heat from one place to another; or uses a heat temperature difference to induce sound, which can be converted to electricity with high efficiency, with a (piezoelectric) loudspeaker