In this case the unit CF1 is very active in the interval 0.45–0.75 corresponding to /e/, and less active in the intervals corresponding to /o/ and /u/. Residual activity is detected in the interval corresponding to /i/. The unit CF2 is very active in the interval corresponding to /e/ and residual activity is detected around the interval corresponding to /i/. Thus /e/ is selected by Vowel Band Grouping.