2006-09-07 18:53:00 · 5 answers · asked by Anonymous in Education & Reference ➔ Trivia
feedback. Ambient noise goes thru the mic, then amplified, then out thru speaker, which adds to ambient noise.
2006-09-07 18:58:02 · answer #1 · answered by thrag 4 · 2⤊ 0⤋
It's called mic feedback. The mic picks up a sound from the speakers. Sends it to the amp and the to speakers. So, it becomes a continous loop, unless you move the mic away from the speaker.
That's why it gets louder and louder if you can bear to keep it in the "loop". Since the mic is sensitive, it will pick up freq. silent to humar ears and then when you amp it, it is a very shrill noise.
Good question.
2006-09-08 02:05:42 · answer #2 · answered by Starguru 2 · 1⤊ 0⤋
It is called feedback, it is sound created when a transducer such as a microphone or electric guitar picks up sound from a speaker connected to an amplifier and regenerates it back through the amplifier.
2006-09-08 02:00:17 · answer #3 · answered by roscoedeadbeat 7 · 0⤊ 0⤋
It's picking up noise from the speaker and then regenerating it back from the speaker.
2006-09-08 02:00:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋
audio feedback
http://en.wikipedia.org/wiki/Audio_feedback
2006-09-08 02:00:52 · answer #5 · answered by buddhaboy 5 · 0⤊ 0⤋