PASCO WA-9612 RESONANCE TUBE - Manual (Page 21)

012-03541E Resonance Tube
17
Suggested Demonstration
EQUIPMENT NEEDED:
— PASCO Resonance Tube
— Cork Dust
— Speaker
— Function Generator
— Resonance Tube Plunger
Introduction
Your PASCO WA-9612 Resonance Tube can be used as a Kundt's Tube with some minor
modifications. This makes a very effective demonstration for a class or for students working
in small groups.
Procedure
➀ Sprinkle a small amount of cork dust evenly along the bottom of the resonance tube. Rotate
the tube slightly so the cork dust is positioned slightly up the side of the tube.
➁ Set the speaker at the end of the tube as shown in the diagram. Adjust the amplitude and
frequency until you obtain a standing wave in the tube. (Accompanied by a marked increase
of amplitude of the sound.) At this point, displacement antinodal areas will show rapid
movement of the cork dust, while nodal areas will show no movement.
➂ You can now adjust the frequency to other standing wave frequencies, or you can put the
plunger in one end to observe the difference in closed tube standing waves versus open tube
standing waves.
T T L
H I Ω
G N D
L O Ω
M I N
R A N G E
A D J U S T
M A X
O U T P U T F R E Q U E N C Y
A M P L I T U D E
P I - 9 5 8 7 B
D I G I T
A L F U N C T I O N
G E N E R A T O R - A M P L I F I E R
H E RT Z
W AV E F O R M
I N P U T G N D
E X T E R N A L
1 2 3 4 5
SPEAKER INPUT
.1 W MAX
Speaker
Cork Dust
Function Generator
Resonance Tube