Last Updated：2025/12/30
Sentence
Phonation.
The
voice
is
produced
when
the
closed,
taut
vocal
folds
in
the
position
of
phonation
are
opened
and
made
to
vibrate
by
an
air
stream
expelled
from
the
lungs,
causing
sound
waves
to
be
produced.
The
volume
of
sound
depends
on
the
force
of
the
air
stream,
and
the
pitch
is
determined
by
the
frequency
of
vibration.
The
latter
depends
on
the
length
(sex
and
age
differences),
tension
and
thickness
of
the
vocal
cords,
as
in
the
strings
of
a
musical
instrument.
Quizzes for review
Phonation. The voice is produced when the closed, taut vocal folds in the position of phonation are opened and made to vibrate by an air stream expelled from the lungs, causing sound waves to be produced. The volume of sound depends on the force of the air stream, and the pitch is determined by the frequency of vibration. The latter depends on the length (sex and age differences), tension and thickness of the vocal cords, as in the strings of a musical instrument.
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