W wh wh wh Better in what sense ?
Um. Well , first of all , the pitch tracks are m have less , um , halvings and doublings than  than Switchboard and there 's a lot less dropout , so if you ask how many regions where you would normally expect some vowels to be occurring  are completely devoid of pitch information ,
Mm - hmm.
in other words the pitch tracker just didn't get a high enough probability of voicing for words  for  for , you know , five word