PASCO WA-9612 RESONANCE TUBE - Manual (Page 5)

012-03541E Resonance Tube
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Introduction
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. Waves in the tube are produced by a speaker and
detected by a miniature microphone. The microphone
can be mounted beside the speaker to detect resonance
modes, or it can be mounted on a rod and moved
through the tube to examine wave characteristics
inside the tube.
➤ NOTE: To use the Resonance Tube, you
will need an oscilloscope to examine the signal
detected by the microphone, and a signal genera-
tor capable of driving the 32
Ω
0.1 W speaker.
Equipment and Setup
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WA-9612
RESONANCE TUBE
SPEAKER INPUT
.1 W MAX
Speaker
Tube mounting
stands
Moveable piston
Tube with built-in metric scale
Clamp-on hole
covers
Microphone
mount
Coax
adapter
Miniature
microphone
Microphone battery
and circuitry
The WA-9612 Resonance Tube comes with
the following equipment (see Figure 1):
• 90 cm clear plastic tube with a built-in metric
scale
• Two tube mounting stands, one with a built-in
speaker and a mount for the microphone
• Miniature microphone with a battery powered
amplifier (battery included) and a coax connector
for direct attachment to an oscillosocope
• Moveable piston
• Microphone probe rod (86 cm brass rod, not
shown)
• Clamp-on hole covers
Figure 1 Equipment Included with the WA-9612 Resonance Tube