First International Conference on Spoken Language Processing (ICSLP 90)
Dynamic variations of the voice source in ordinary speech have been studied by means of inverse filtering of the sound pressure wave. The inverse filtered voice pulses have been matched by the LF-model to achieve a parametric description. Special attention was given to the spectrum of the pulses. The speech material consisted of sentences and vowels uttered by three female speakers judged to differ in voice quality. The voices were judged to be normal and their quality ranged from somewhat tight and sonorous to thin. The variation of the voice source parameters with place and manner of articulation will be discussed. The length of the closing time in the voice pulse is shown to vary with vowel height; a more open vowel shows a shorter closing time. This tendency seem to be true for the three different voices studied even though the range can vary with voice type. Consonants have been studied, especially concerning the influence of spectral zeros and the transition between consonants and vowels. Variations of the different glottal parameters within sentences have also been studied in relation to voice type.
Bibliographic reference. Karlsson, Inger (1990): "Voice source dynamics for female speakers", In ICSLP-1990, 69-72.