H: Sound

These demonstrations present the basics of sound wave production and transmission.

This section demonstrates the effects of the wave nature of sound, including interference, beats, resonance, and the Doppler effect.

Demonstrations in this section illustrate standing sound waves in open and closed systems, and resonance as sound production and amplification. Here are also demonstrations of the effects of resonance on objects.

Here are demonstrations of tuning and other musical concepts, and of various classes of musical instruments.

These demonstrations cover the operation of the human ear, and some phenomena of hearing and sound processing.

This section offers demonstrations on voices and speech, mostly human.