In
helping a student learn to control air expenditure, it
is important for the student to become aware of how air
is used for speech and to know when speech is being produced
with insufficient air support. Visual feedback may be
used to show insufficient air usage.

Compare
the two attempts in the next segments and note how the
second one shows better use of air during counting. The
second segment also shows student recognition of insufficient
air support at the end of his utterance.