I've got a project that I've put on the shelf and haven't finished. I wanted to figure out how to create stable acoustic feedback, and I can show that a single long-length (on the order of RT60 room reverberation time) FIR filter can be used to equalize the acoustic feedback path. I never succeeded in all my experiments except to create really loud noises that I thought were going to destroy my loudspeakers, burn down my house, etc... Perhaps other people have been more successful with acoustic feedback.

The primary problem I found was that simple inverse and regularized least-squares methods would produce "ringing" and non-compact solutions that would result in instability when applied. I don't have time to share all the math tonight, but I will help with the "discussion" part of all this :)

Chuck

On Tue, Sep 8, 2009 at 9:25 PM, Jerome Covingtoninfo@thespacebetweenthewords.org wrote:

I'm interested to know who's been working with feedback, and if anyone has any patches they've developed, or that others have developed that they think is exemplary.

-- Regards, Jerome Covington  .  .  .  .   :   .  .  .  .   : "define audio development"

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