right ? So  so  Um. So , um , if you knew you were doing that , if you were doing something say for a  a , uh  a  a Vocoder , you wouldn't use the same kind of features. You would use something that was sensitive to the periodicity and  and not just the envelope. Uh , and so in that sense it was an unfair test. Um , so I think that the questioner was right. It  it was in that sense an unfair test. Nonetheless , it was one that was interesting because , uh , this is what we are actually using for speech recognition , these smooth envelopes. And this says that perhaps even , you know , trying to use them in the best way that we can , that  that  that we ordinarily do , with , you know , Gaussian mixtures and H M Ms  and so forth , you  you don't , uh , actually do that well on determining whether something is sonorant or not.
Didn't they
Which means you 're gonna make errors between similar sounds that are son sonorant or obstruent.
Didn't they also do some kind of an oracle experiment where they said " if we  could detect the sonorants perfectly  and then show how it would improve speech recognition ? I thought I remember hearing about an experiment like that.