Speech Prosody 2004
Tones 4 and 8 of Hanoi Vietnamese have strongly contrasting voice quality features: tone 4, which is glottally constricted, is here compared with a similar but nonconstricted tone (tone 8). Under emphasis, the slope of F0 curves is increased and/or F0 register is raised. The open quotient values (calculated from the derivative of the electroglottographic signal, which has been shown to yield very accurate values) do not vary significantly with emphasis. A description in terms of curve amplification is put forward. As for changes in length, they appear to be speaker-dependent.
Sound Examples (for explanations, see appendix in the full paper):
s1t8eA s1t8eE s1t8neA s1t8neE
s2t4neA s2t4neE s2t8neA s2t8neE
s3t4neA s3t4neE s3t8neA s3t8neE
fig1aAUD fig1aEGG fig1bAUD fig1bEGG
Bibliographic reference. Michaud, Alexis / Tuân, Vu Ngoc (2004): "Glottalized and nonglottalized tones under emphasis: open quotient curves remain stable, F0 curve is modified", In SP-2004, 745-748.