We present new feedback methods as part of Computer-Assisted
Pronunciation Learning (CAPL) system. For the speech sounds that
pronunciation errors are pointed out, we isolate the central frames of
their corresponding segments using the HMM segmenter and trigger the
feedback modules. For vowels, we plot the formant frequency
on the vowel diagrams mapped onto the open/close
position on the jaw and front/back on the tongue, whereas for
consonants we classify the frames into the categorical articulation on
the place and manner of articulation in order to see whether or not
the learners' articulation is correct. Finally, we show examples of
learners' improved pronunciation through the system feedback.
, 
) for Vowels
