CHAPTER IV--EFFICIENCY THROUGH CHANGE OF PITCH
Speech is simply a modified form of singing: the principal difference being in the fact that in singing the vowel sounds are prolonged and the intervals are short, whereas in speech the words are uttered in what may be called "staccato" tones, the vowels not being specially prolonged and the intervals between the words being more distinct. The fact that in singing we have a larger range of tones does not properly distinguish it from ordinary speech.
to read more Public Speaking Using Pitch
