Sound amplification by stimulated emission of radiation mechanism and an active medium. The pumping procedure can be induced for example by an alternating electric field or with some mechanical vibrations of resonators, followed by acoustic amplification in the active medium. The fact that a SASER operates on principles remarkably similar to a laser, can lead to an easier way of understanding the relevant operation circumstances. Instead of a feedback-built potent wave of electromagnetic radiation, a SASER delivers a potent sound wave. Some methods for sound amplification of GHz-THz have been proposed so far. Some have been explored only theoretically and others have been explored in non-coherent experiments.
A Sound of Thunder (band) feels like it flies by in hail of harmony, wailing vocals, and addictive riffs. Despite the wealth of melody and energetic feel of the record, A Sound of Thunder did not short change the listener on substance or depth. Every track feels like a mini-masterpiece unto itself. Each spin through the album reveals more details and invites another journey through. Every individual performance is on point, and while they all shine on their own, it is in the collective that they ascend to something greater. While the band may not see it as such, It Was Metal is A Sound