Orest Symko at University of Utah began a research project in 2005 called Thermal Acoustic Piezo Energy Conversion (TAPEC).
Orest Symko je na Sveučilištu u Utahu počeo istraživački projekt u 2005. pod nazivom Termo akustična piezo energetska pretvorba (Thermal Acoustic Piezo Energy Conversion; TAPEC).