I'm doing a problem in thermodynamics that deals with sound waves and the bulk modulus B and it got me thinking. Since the compressional waves would be travelling far too fast to be considered isothermal, I assume you must consider them to be adiabatic compressions of air. Now if adiabatic compression allows no heat to leave the compressed gas, does this mean the temperature of the air would rise? In other words, if I were to totally isolate a set of really loud speakers and leave them blasting for a few hours, would the air around them be noticably hotter? Just looking for some insight on the nature of compressional heating, forgive me if this idea is totally ridiculous (but please tell me why .