co-articulation

When the epiglottal co-articulation becomes a trill, the vowels are called strident.

This is known as co-articulation.

Because the design was based on a single reed as the glottal sound-source, he had none of the problems of co-articulation that came inherently with the second design.

And in the process of building syllables and words, the sonic "overlap" (now referred to as co-articulation) rendered sounds very uncharacteristic of human speech, undermining the intention of the design altogether.

Harsh voice, also called ventricular voice or (in some high-tone registers) pressed voice, is the production of speech sounds (typically vowels) with a constricted laryngeal cavity, which generally involves epiglottal co-articulation.

The difficulty of this problem is compounded by the phenomenon of co-articulation of speech sounds, where one may be modified in various ways by the adjacent sounds: it may blend smoothly with them, fuse with them, split, or even disappear.