On the scope you will see that connecting the speaker causes distortion to the signal. Again play with the function generator controls to see how changes in frequency and amplitude affect what you hear. Speak into the mike and adjust the scope so that you can see the waveform that your voice yields. Try to observe the waveforms of some other sounds. Use the scope to accurately measure the period of the sine wave and record this on your report sheet.
Lissajous patterns are fun to produce and nifty to view but they have practical uses, too.
The idea here is to NOT use the scope's internal horizontal time-base circuitry but instead to drive the dot side to side at 60 times per second by using an AC wave from your AC power supply. At the same time you will drive the dot up and down using the signal from the function generator. Adjust the function generator's output level in concert with the scope controls to view a sine wave 6 divisions tall. If you are using an AW Sperry scope , connect the second probe from the CH B scope input to the AC output of the power supply. Play with the frequency settings of the function generator until each of the following patterns is observed.