Assertion: glottis | /r/HasProperty | childers
Facets:
Source sentences:
text: The spectral envelope is flatter (the higher harmonics are less weak) in loud speech or singing, which have an abrupt closure of the vocal folds and a short open phase of the glottis (Childers and Lee, 1991; Gauffin and Sundberg, 1989, Novak and Vokral, 1995).