What is the definition of vocal expression in drama?

Answer 1

It is possible to deliver a line totally monotonously, without any variation of pitch, volume, accent, articulation or speed of delivery. People will do this when they are trying to sound like a computer talking. However, real speech conveys much more than the simple meaning of the words by varying those five things.

Pitch is whether the voice is high or low. Lower-pitched voices project power and often domination. Higher-pitched voices project weakness and fear. By changing from one's normal pitch to a lower one you become threatening; if you suddenly go higher you sound frightened. A gradual increase in pitch, especially when combined with an increase in speed can convey excitement or even hysteria.

Volume is whether the voice is loud or soft. If you want to sound commanding or belligerent, a louder voice is preferable, if you are conciliatory or persuasive, a softer one is better.

Speed is whether the words are delivered rapidly or slowly. A slow delivery can suggest thoughtfulness, perhaps even stupidity.

Accent is an abrupt increase of volume or decrease in speed or both to emphasize a particular word. Incorrect accent can totally change the meaning of a line.

Articulation is whether the sounds in the words are said clearly or not. Sloppy articulation can suggest drunkenness, sleepiness, laziness or carelessness. Extremely precise articulation might suggest fussiness or criticism.

Vocal expression in drama is the use of these factors to more clearly convey the meaning of the line.