Sound amplification by stimulated emission of radiation phenomenon, known as the Larsen effect, is the result of a positive feedback. In general, every oscillator consists of three main parts. These are the power source or pump, the amplifier and the positive feedback leading to the output. The corresponding parts in a SASER device are the excitation or pumping mechanism, the active (amplifying) medium, and the feedback leading to acoustic radiation. Pumping can be performed, for instance, with an alternating electric field or with some mechanical vibrations of resonators. The active medium should be a material in which sound amplification can be induced. An example of a feedback
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