Definition: Acoustic Emitter: A device designed to generate sound waves, such as sounds from a guitar or bass drum, by emitting acoustic energy. In physics, it refers to any mechanical component that generates sound in the form of mechanical vibration. Definition: Acoustoelectric is a type of electronic device used for generating sound waves without the need for a physical medium, such as air or water. It converts electrical current into mechanical vibrations and then converts these vibrations back into mechanical energy (usually in the form of heat). Acoustic emission devices are commonly found in electric guitars, bass amplifiers, and other audio equipment that generate high frequencies, like electronic drums or synthesizers. In summary, acoustic emission is a type of device designed to generate sound waves without using physical mediums such as air or water. It converts electrical current into mechanical vibrations (usually heat) before converting those vibrations back into mechanical energy in the form of sound.