Oh , and um ,  another f first step is um , so the  the way I want to extend his work is make it able to deal with a time varying reverberation response um  and um we don't really know  how fast the um  the reverberation response is varying the Meeting Recorder data um so um  we  we have this um block least squares um imp echo canceller implementation and um  I want to try  finding  the  the response , say , between a near mike and the table mike for someone using the echo canceller and looking at the echo canceller taps and then  see how fast that varies  from block to block.
Mm - hmm.
That should give an idea of how fast the reverberation response is changing.
Mm - hmm.