Acoustic feedback is a phenomenon that occurs when sound waves from a speaker are amplified by an acoustic loop. This can happen when the speaker is placed too close to a microphone, or when there’s a delay in the sound system. Feedback can also occur if the sound system is poorly designed, or if it’s not been properly tuned.
There are three main types of feedback:
1) Microphone feedback
2) Line-level feedback
3) Speaker cone feedback
Microphone feedback happens when the sound from the speaker is picked up by the microphone and then amplified again. This can be avoided by placing the microphone further away from the speaker, or by using a directional microphone. Line-level feedback happens when there’s a delay in the sound system, which causes the sound from the speakers to be amplified before it reaches the microphones. This can be avoided by using a digital mixer with built-in delays, or by adding external delays to your analog mixer. Speaker cone feedback happens whensound waves from the speakers cause vibrations in the speaker cones, which are then amplified. This can be avoided by using speakers with damping materials such as Sorbothane, or by placing them further away from walls and other hard surfaces.