In the timbre or the sound produced by the larynx itself, the higher harmonics are consistently weaker than the lower ones
	The resonating chambers ol the throat and mouth favour certain parts of the spectrum, depellding uponthe exact size and shape of the throat and mouth at each moment; here the vowel is ah
	The effect of the two elements combined. The high points in the curve are called formants and the timbre of the voice depends more upon these changing formants than upon the constant element of the laryngeal timbre; here the vowel is ah