Fig. 1
From: Articulation constrained learning with application to speech emotion recognition
Relationship between angry (left panel) and sad (right panel) emotions, acoustic characteristics, and articulatory information for an utterance “compare me to” by a male speaker. (Top row) Spectrogram and formant tracks, (middle row) position of the jaw along Y-axis, and (bottom row) position of the lip along Y-axis. Note the differences in articulatory position and frequency response for vowels /AE/ and /IY/ of words “compare” and “me”, respectively. Negative axis corresponds to downward movement along the Y-axis