Sound amplification by stimulated emission of radiation the axes of the mirrors, it is possible for photons to repeat multiple reflections and force more and more photons to follow them producing an avalanche effect. The number of photons of this coherent laser beam increases and competes the number of photons perished due to losses. The basic necessary condition for the generation of a laser radiation is the population inversion, which can be achieved either by exciting atoms and inducing percussion or by external radiation absorption. A SASER device mimics this procedure using a source-pump to induce a sound beam of phonons. This sound beam propagates not in
Make a Sound Make a Sound Make a Sound is the only album by American rock band Autopilot Off. In April and May, the group supported Rufio on their headlining US tour. "Make a Sound" was released on April 13 through Island Records and produced by then-Sum 41 producer and manager Greig Nori. The Japanese version of "Make a Sound" includes a bonus track titled "Raise Your Rifles". There is also a limited edition print of the album, that, as well as the Japanese bonus track, includes two additional exclusive songs. "Make A Sound" appears in the soundtrack for "", "Chromatic Fades" in