Nearly all writers have used the term " break "
to indicate the point at which a new register be-
gins. Behnke held that the break between the
thick and the thin register occurred in both sexes
at about r# j n . The vocal bands in this



part of *)' " *~ ' the scale vibrate in their
entire breadth, and the series of tones above
the point just referred to is produced by a new
mechanism, but one which is the same for all
voices and both sexes — i. e., only the inner edges
of the vocal bands vibrate.
According to Behnke, the male voice has but two
registers, the thick and the thin, but the female
voice three, the thick, the thin, and the small.
These terms were not original with Behnke, but
had been used earlier by Curwen.
