mplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation.[1] It focuses sound waves in a way that they can serve as accurate and high-speed carriers of INFORMATION in many kinds of applications—similar to uses of laser light.[citation needed]Acoustic radiation (sound waves) can be emitted by using the process of sound amplification BASED on stimulated emissionof phonons. Sound (or lattice vibration) can be described by a phonon just as light can be considered as photons, and therefore one can state that SASER is the acoustic analogue of the laser.[citation needed]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.I hope this answer is helpful to u...❤❤❤Keep Asking... ✌️✌️✌️✨✨✨If help u. MARK my answer as brainliest✨✨✨❤️❤️❤️Thank You❤️❤️❤️