PASCO WA-9900 Open Speaker - Manual (Page 6)

®
Model No. WA-9900 Open Speaker
5
3. Ask students to adjust the Resonance Tube such that a 50 cm closed
tube is created.
4. Have students start at a frequency of 50 Hz and increase until they
find four different resonant frequencies. Ask students to look for a
pattern in the data.
5. Increase the length of the closed tube to 100 cm and repeat step 4.
Have students compare/contrast their data from the two different
length tubes.
6. Remove the inner tube from the Economy Resonance Tube and
repeat the experiment. Have students compare/contrast their data
for the open and closed tubes.
Specifications:
Open Speaker
Frequency range: 80-80,000 Hz
Diameter: 5 1/4” woofer
Maximum power: 60 Watts
Sensitivity: 85 dB
Impedance: 8 Ohms
Figure 1: Placement of Resonance Tube relative
to the Open Speaker