The PASCO Model WA-9612 Resonance Tube lets
you investigate the propagation of sound waves in a
tube. You can observe standing wave patterns in a
closed or open tube, and locate nodes and antinodes
while varying the length of the tube. You can measure
the speed of sound in the tube either indirectly, by
measuring the frequency and wavelength of a reso
nance mode, or more directly, by using a triggered
oscilloscope to measure the transit times for sound
pulses along the tube. The tube also has two holes in it
that can be covered or uncovered to investigate the
physics of wind instruments.