Oh , it 's on the transfer function for the Wiener filter.
Yeah.
Yeah , OK.
Yeah , so basically we tried  different configuration within this idea. We tried u u applying this on mel bands , having spectral subtraction instead of wiener filtering. Um. Well , finally we end up with  this configuration that works , uh , quite well. So we are going to fix this for the moment and work on the other aspects of  the whole system.