Sound amplification by stimulated emission of radiation of the laser. In a SASER device, a source (e.g., an electric field as a pump) produces sound waves (lattice vibrations, phonons) that travel through an active medium. In this active medium, a stimulated emission of phonons leads to amplification of the sound waves, resulting in a sound beam coming out of the device. The sound wave beams emitted from such devices are highly coherent. The first successful SASERs were developed in 2009. Instead of a feedback-built wave of electromagnetic radiation (i.e., a laser beam), a SASER delivers a sound wave. SASER may also be referred to as "phonon laser",
A Web of Sound A Web of Sound A Web of Sound is the second album by the American garage rock band the Seeds. Produced by Marcus Tybalt and released in October 1966, it contained the single "Mr. Farmer" and the 14-minute closing song "Up In Her Room". The album did not chart, though it has received generally favorable reviews from music critics. Lead singer Sky Saxon conceptualized the album's cover design depicting the four Seeds members trapped in a spider's web. "A Web of Sound" was produced by Saxon under the pseudonym Marcus Tybalt; Saxon also wrote or co-wrote all of the songs