ELI5 : Why do guitar amplifiers give off bad feedback? guitars in giant rock concerts don’t normally do this, how they can be so loud without feedback?
In: Technology
I don’t know how they do it, but I work in the software industry and we have a technique to remove feedback loops: you cancel it.
This is done using adaptive feedback cancellation.
Basically, the algorithm learn the correlation between the sounds it emit and the sounds it receives back. It depends on the frequencies, the shape of the room, the distance and orientation if the speakers and microphones. Once this is learned, during the concert it can predict the feedback it will receive and subtract it from the sounds received on the mike.
The adaptive part is because you probably want to continuously adapt to possible change in feedback response because your singer moved the mike, or the sound comes louder than during testing, etc…
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