− | Three laptops are required. Two emit audio tones of 1000Hz and 1002Hz. The third graphs the sound level its microphone receives. | + | Three laptops are required. Two emit audio tones of 1000Hz and 1002Hz. The Python block [[File:Pythoncodeblock.jpg|40px]] is loaded with the code <i>sinewave.py</i> The third laptop graphs the sound level its microphone receives. |