<unk>  is the process by which the basic product of phonation is enhanced in timbre and/or intensity by the air-filled cavities through which it passes on its way to the outside air. Various terms related to the<unk>  process include amplification, enrichment, enlargement, improvement, intensification, and prolongation, although in strictly scientific usage acoustic authorities would question most of them. The main point to be drawn from these terms by a singer or speaker is that the end result of<unk>  is, or should be, to make a better sound.
Vocal resonation
Pressure of speech
Poop Breath
Sensory decussation
Cough reflex
Excessive tearing
Cramp
Acoustic reflex