PASCO WA-9612 RESONANCE TUBE - Manual (Page 15)

012-03541E Resonance Tube
11
Analysis
Use the data that you have recorded to sketch the wave activity along the length of your tube for
both the open and closed tube at each of the frequencies you used.
The microphone you are using is sensitive to pressure. The maxima are therefore points of
maximum pressure and the minima are points of minimum pressure. On your drawings, indicate
where the points of maximum and minimum displacement are located.
Determine the wavelength for the waves in at least two of your trials. Given the frequency of the
sound wave you used in each configuration, calculate the speed of sound in your tube. How
does this agree with the accepted value of 331.5 m/sec + .607 T, where T is the temperature in
Celsius degrees?
Describe the nature of the wave behavior at the end of an open tube based on your measure-
ments. Also describe the nature of the waves at a solid obstacle like the face of the piston.
Table 2.1 Open Tube
Resonant Frequency: _____________
Microphone Positions
Maxima Minima
Table 2.2 Closed Tube
Resonant Frequency: _____________
Microphone Positions
Maxima Minima