Continuous wavelet transform for analysis of speech prosody
Martti Vainio, Antti Suni, Daniel Aalto · Työväentutkimus Vuosikirja · 2013
Wavelet based time frequency representations of various signals are shown to reliably represent perceptually relevant patterns at various spatial and temporal scales in a noise robust way. Here we present a wavelet based visualization and analysis tool for prosodic patterns, in particular intonation. The suitability of the method is assessed by comparing its predictions for word prominences against manual labels in a corpus of 900 sentences. In addition, the method’s potential for visualization is demonstrated by a few example sentences which are compared to more traditional visualization methods. Finally, some further applications are suggested and the limitations of the method are discussed.