Fig. B.

Automatic detection of syllables and prosodic stress pattern for the spoken sentence “Mary Mary quite contrary” using the S-AMPH model. The top panel shows the original waveform (grey), the Syllable AM for spectral band 3 (green line) and the Stress AM cosine phase for spectral band 3 (red line). The 8 peaks in the Syllable AM that are automatically detected (green dots) correspond to the 8 spoken syllables in the sentence. For each Syllable AM peak, the concurrent Stress AM phase is automatically recorded (red dots). These phase values are then used to compute the prosodic strength (0–1) for each syllable. The bottom barchart shows the prosodic strength computed by the S-AMPH model for each of the 8 detected syllables in the utterance. Consistent with the trochaic patterning of the sentence, the computed syllable stress pattern is ‘s–w–s–w–s–w–s–w’.