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
A-sound success in brief time. Lead Vocalist : Temuulen .TS (Ц. Тэмvvлэн) Born : 1983 29th Oct., 33 years old Has a bachelor's degree from Health Science University In Mongolia, Pianist : Purevsukh .T (Т. Пvрэвсvх) Finished Mongolian University Of Art & Culture, Bassist : Munkhbold .N (Н. Мөнхболд), Drummer :Batpurev (Батпvрэв), Lead Guitarist : Altangerel (Алтангэрэл) They chose "A-sound " as a name, as the meaning the best sound. Everything in A is the best, even at the school A mark is the highest point, that's why they preferred letter " A ", and "Sound". " A-Sound " ( The