Beakman explains what sound waves and vibration are and explains how these create music. He then goes on to show that the human vocal chords create music due to changing sound vibrations.

Beakman explains how planes break the sound barrier and create sonic booms.

Ms. Frizzle and her class learn about vibrations and sound by playing with instruments and hitting objects. They not only hear and feel sound but see it using special glasses. Among many other lessons, they learn that high sounds are created by a fast vibration and low sounds are created by a slow vibration.

Beakman explains how harmonicas work. He starts by explaining what sound waves are and their properties. He then explains how a harmonica uses reeds to create different sound waves.

While moving his stuff to the basement, George encounters a scary noise. He uses a recorder he finds the object creating the noise.