Singing versus speaking
Singing is distinguished from speaking by the manner in which the breath is expended to vibrate the vocal cords. Singing requires more breath the louder, higher, and longer one sings. It also requires that the emission of breath be more firmly controlled. A pertinent analogy is the function of the instrumentalist’s breath in playing a reed instrument—e.g., a clarinet, an oboe, or a saxophone. The technique of singing depends ultimately on the coordination of the various anatomical mechanisms in order to produce a propulsion of sound in a steady flow. A further distinction between singing and speaking is the control that is required, in singing, of the movement and reflexes of the larynx. As one sings higher, the larynx tends to rise sympathetically and at a certain point becomes an interference causing the voice to break, or crack. Not much movement of the larynx occurs within a singer’s normal range, which is usually about an octave and a third. Beyond that range, either above or below, an element of technical accomplishment sets the professional off from the unschooled amateur.