Determine the Speed of Sound

Step 2 Record Your Sound

Stand the tube up on a hard surface or place against a wall. Hold the microphone right at the opening of the tube. Start recording in Audacity. Snap your fingers near the microphone. A weak, pathetic snap tends to work better than a strong one. Snap a few more times so that your odds of having a good one will increase.

Note, you want your hand above the microphone to get the most precise answer.