- A phenomenon that occurs when the sound waves produced by speakers interact with an input transducer such as a microphone or phonographic cartridge. If the feedback exceeds a certain amount, any of various unde-sired effects may occur, such as howling, whistling, motor-boating, or excessive cone movement. Also, the sound heard as a consequence of this. Also known as acoustic feedback, acoustic regeneration, acoustic howl, audiofrequency feedback, audio feedback, or howl (1).
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