2006-07-06 09:35:14 · 5 answers · asked by Alias_J 1 in Science & Mathematics ➔ Engineering
Audio feedback (also known as the Larson effect) is a special kind of feedback which occurs when a loop exists between an audio input (for example, a microphone or guitar pickup) and an audio output (for example, a loudspeaker). In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. This is a good example of positive feedback. The frequency of the resulting sound is determined by resonant frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them.
2006-07-06 09:37:37 · answer #1 · answered by whoselineguy 4 · 0⤊ 0⤋
to put it simply, the speaker is constantly sending out white noise that is too low for humans to hear normally, but when the microphone picks it up and then amplifies it and sends it through the speaker, we hear the sound as a high pitched screech, thus creating what is known as a feedback loop.
2006-07-06 16:44:24 · answer #2 · answered by Rich P. 2 · 0⤊ 0⤋
It is also known as acoustic feedback. and it is positive.
There is such a thing as negative feedback but that's another story.
2006-07-06 23:41:51 · answer #3 · answered by dmb06851 7 · 0⤊ 0⤋
"when the music goes 'round and 'round, Oh, Oh, it comes out here" - the speaker.
2006-07-06 16:41:00 · answer #4 · answered by Puzzleman 5 · 0⤊ 0⤋
http://entertainment.howstuffworks.com/question263.htm
2006-07-06 16:40:21 · answer #5 · answered by Gray Matter 5 · 0⤊ 0⤋