Last Updated：2022/12/22
Sentence
All
organ
pipes
are
divided
into
two
general
classes,
labial
and
lingual
pipes.
The
main
difference
between
the
two
classes
is
the
manner
by
which
the
vibrations
producing
the
sound
are
caused.
In
labial
pipes
the
column
of
air
entering
the
pipe
under
pressure
is
set
in
vibration
by
a
fixed
obstruction
at
the
mount
of
the
pipe.
[…]
[T]he
obstruction
at
the
mouth
[…]
causes
the
column
of
air
to
vibrate.
In
the
lingual
or
reed
pipe,
the
vibrations
are
caused
by
the
air
passing
through
a
metal
reed,
which
causes
the
tongue
of
the
reed
to
vibrate,
thereby
setting
up
sympathetic
vibrations
in
the
column
of
air
in
the
pipe.
Quizzes for review
All organ pipes are divided into two general classes, labial and lingual pipes. The main difference between the two classes is the manner by which the vibrations producing the sound are caused. In labial pipes the column of air entering the pipe under pressure is set in vibration by a fixed obstruction at the mount of the pipe. […] [T]he obstruction at the mouth […] causes the column of air to vibrate. In the lingual or reed pipe, the vibrations are caused by the air passing through a metal reed, which causes the tongue of the reed to vibrate, thereby setting up sympathetic vibrations in the column of air in the pipe.
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