Just watch. Bug #1: To start, you have to click the green flag, and then the start button. Direction: When you are done measuring loudness, click the stop button and look at the list "sound measurements". The list will have thousands of sound measurements. Alternatively, you can look at the screen which shows the sound wave you are producing. Please report bugs in the comments so I can fix this project. Speed: It takes about 1-millisecond to do a sound measurement.
I wanted a sound-controlled project and ended up with this instead because I didn't know how to make a voice interpreter.