Figure 7.20 shows a typical harmonic spectrum for the human voice at several different frequencies. The harmonic spectrum of the human voice at various frequencies. Some people are able to name the pitch of a sound to less than a semitone. It seems to be a hereditary trait as opposed to one that is learned. Whatever its cause, it is certainly cherished by those few musicians who have it.
All wind instruments consist of a sound generator and a resonant air column.
As water is poured into a soda bottle the pitch of the sound produced increases as the water level increases. An organ pipe has a pitch of C 4 in air. Show that the third harmonic of an open organ pipe is the octave of the first overtone of a closed pipe of the same length. Show that the second overtone of a closed organ pipe is a major third above the second harmonic of an open organ pipe of the same length. An open flue organ pipe is 3 m long and 5 cm in diameter.