Acoustic correlates of perceived syllable prominence in German.

This paper explores the relationship between perceived syllable prominence and the acoustic properties of a speech utterance. It is aimed at establishing a link between the linguistic meaning of an utterance in terms of sentence modality and focus and its underlying prosodic features. Applications of such knowledge can be found in computer-based pronunciation training as well as general automatic speech recognition and understanding. Our acoustic analysis confirms earlier results in that focus and sentence mode modify the fundamental frequency contour, syllabic durations and intensity. However, we could not find consistent differences between utterances produced with noncontrastive and contrastive focus, respectively. Only one third of utterances with broad focus were identified as such. Ratings of syllable prominence are strongly correlated with the amplitude Aa of underlying accent commands, syllable duration, maximum intensity and mean harmonics-to-noise ratio.