1) Speech 
Prolation is a term used in the theory of the mensural notation of medieval and Renaissance music to describe its rhythmic structure on a small scale. The term is derived from the Latin prolatio, first used by Philippe de Vitry in describing Ars Nova, a musical style that came about in 14th-century France. Prolation, together with tempus, correspo...
utterance
• (n.) The act of prolating or pronouncing; utterance; pronunciation. • (n.) The act of deferring; delay. • (n.) A mediaeval method of determining of the proportionate duration of semibreves and minims.
Pro·la'tion noun [ Latin prolatio : confer French prolation .] 1. The act of prolating or pronouncing; utterance; pronunciation. [ Obsolete] Ray. 2. The act of deferring; delay. [ Obsolete] Ainsworth. 3. (Mus.) A mediæval method of determ...
Prolation was a mediaeval method of determining of the proportionate duration of semi-breves and minims.
the time relationship between a semibreve and a minim in mensural notation.