[gdubs]

This is an _incredibly_ well-crafted piece of work. I mean -- my god -- the pressure wave animation? [1]

1: http://jackschaedler.github.io/circles-sines-signals/sound.h...

[davyjones]

As a side note, the pressure that is waxing and waning in that diagram is very very small compared to atmospheric pressure.

The actual air molecules are moving at a much higher speed (the root mean squared velocity is dependent on the temperature). But if we imagine that these are weightless dust particles suspended in air, the diagram is accurate.

[protonfish]

The D3 animations work great for me in Chrome, but my Firefox is choking on them - especially this one.