Beakman explains amplification and how sound is generated. He mentions that certain sounds are louder than others due to the amount of air they disturb. They conduct an experiment to demonstrate this concept.
Using an oscilloscope, electronic keyboard, and piano, Bill Nye shows what the waves look like for sounds of varying pitches. He also explains how notes and rhythm play a role in forming what we define as music.
Phil demonstrates how to see sound in action using plastic wrap, a bowl, and table salt. The salt moves around the plastic wrap in response to the sound waves. Phil then maxes out the experiment using a Chladni Plate and sand, and he shows how sand makes different shapes based on the frequently that is emitted.