Audio feedback refers to a sound loop that occurs when the output from an audio system is received by the input. This creates an unpleasant screeching or buzzing sound. There are several synonyms for audio feedback, including sound distortion, audio interference, signal noise, and acoustic resonance. Sound distortion refers to any change or alteration in the sound quality, while audio interference is an unwanted sound generated by electrical or magnetic sources. Signal noise is a random fluctuation that interferes with the transmission and reception of sound waves. Acoustic resonance is the phenomenon of vibrations reinforcing each other, causing the sound to become distorted and amplified. These synonyms help describe the different forms of audio feedback that occur in various audio systems.