In sound production, feedback, distortion and hums … or buzzes as they are sometimes called, can spoil even the most compelling presentation or performance.
Feedback, usually heard as loud, high-pitched squeals, occurs when levels are not accurately tuned or when output interferes with input, such as when the head of a microphone is pointed towards a speaker cabinet.
Distortion, which hampers one’s ability to decipher what is being amplified, is heard when wireless signals, from within or even outside the event space, impede upon each other.
Both feedback and distortion can be avoided, but it is important to note that there is never an absolute guarantee they won’t occur, even with the most professional engineer on deck (who should be able to respond quickly and reduce repeat occurrences).
Hums or buzzes, on the other hand, are most often byproducts of power distribution, and result when the power generating the sound is not “dedicated,” but rather is also supplying power to other equipment. To prevent hums or buzzes, ensure that power secured through your venue professional or power provider for sound amplification (and video, if applicable) comes from “dedicated” circuits separate from that for lighting and kitchen appliances.
