Do the activity suggested in Figure 10.24 with a stereo sound system. Simply reverse the w...

Do the activity suggested in Figure 10.24 with a stereo sound system. Simply reverse the wire inputs to one of the speakers so that the two are out of phase. When monaural sound is played and the speakers are brought face to face, the lowering of volume is truly amazing! If the speakers are well insulated, you hear almost no sound at all.

FIGURE 26.24

The Moon in its various phases.