PASCO Xplorer-GLX Users’ Guide - Manual (Page 142)

136 C o n s t r u c t i v e a n d D e s t r u c t i v e I n t e r f e r e n c e
8. Press to turn on the Left Output Channel. How does the addition of the
Left Output wave affect the sound that you hear?
9. Press and to vary the phase of the Right Output wave again. As you
vary the phase of the Right Output wave between -360° and +360°, how
does the sound of the combined waves change?
10. Listen to the sound. At what values of phase does maximum destructive
interference occur?
11. Press the left arrow key to highlight the Phase of the Left Output Channel.
Press to set the phase to 30°.
12. Press the right arrow key to highlight the Phase of the Right Output Channel
again. While listening to the combined tone, vary the phase of the Right Out-
put wave between -360° and +360°.
13. With the Left Channel phase set at 30°, at what values of phase (for the
Right Channel) does maximum destructive interference occur?
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