Оче наш, који си на небесима, да се свети име Твоје, да дође царство Твоје, да буде воља Твоја и на земљи као на небу
Frequency levitation. It's been here for a while, can't wait for it to be brought to commercial use. Don't know how they managed to keep it from us for so long, it's a simple concept in theory
In many of the large scale applications of thermoacoustic engines, discussed by Swift [4] and Garrett and Hofler [5], a typical operating frequency has been around 500 Hz.
Its simple design and the fact that it is one of a few prime movers that do not require moving parts make such a device an attractive alternative for many practical applications. The acoustic power produced by the TAHE can be used to generate electricity, drive a heat pump or a refrigeration system.
