Why do some microphones screech? And why do the ones at big events like award shows not screech?

Question

Why do some microphones screech? And why do the ones at big events like award shows not screech?

In: 13

Answer 1

That screech is feedback. You speak into the microphone and noise comes out the speaker. Feedback happens when the mic pickups the audio coming out of the speakers and creates a FEEDBACK LOOP. In the movies when the mic screeches at the big conference when the guy is adjusting doesn’t happen. Guitarists do this on purpose. They put their guitar right up into the grill of the amp. The pickups in the guitar pick up the amps output and loop it through creating the high pitched feedback.