pros·o·dy 
(prŏsə-dē)
(prŏsə-dē)n. pl. pros·o·dies
1. The study of the metrical structure of verse.
2. A particular system of versification.
3. The set of speech variables, including rhythm, speed, pitch, and relative emphasis, that distinguish vocal patterns.
[Middle English prosodie, from Latin prosōdia, accent, from Greek prosōidiā, song sung to music, accent : pros-, pros- + ōidē, song; see ODE.]
pro·sodic (prə-sŏdĭk) adj.
pro·sodi·cal·ly adv.
proso·dist n.