All PA systems have a potential for audio feedback, which occurs when sound from the speakers returns to the microphone and is then re-amplified and sent through the speakers again. Sound engineers take several steps to maximize gain before feedback, including ensuring that directional microphones are not pointed towards speakers, keeping the onstage volume levels down, and lowering gain levels at frequencies where the feedback is occurring, using a graphic equalizer, a parametric equalizer, or a notch filter.
Read more about this topic: Public Address
Other articles related to "acoustic feedback, acoustic":
... their own equalization primarily to reduce or eliminate acoustic feedback ... the main problems affecting monitors is acoustic feedback or "ringing" ... Acoustic feedback occurs when the time delay between the acoustic input of a microphone and the output of a monitor speaker is a multiple of the period of a frequency ...