Air movement and sounds
Making the air move can generate nice audible sounds, and we are going learn a bit more about this in the following sections.
If you can make things move with Arduino, you will probably be able to make the air move too.
In fact, we have already done this, but we probably didn't move it enough to produce a sound.
This part is just a short introduction to some definitions and not a complete course about sound synthesis. These are the basic elements that we will use in the next few sections of the book, and as far as possible there will be references of websites or books provided that you can refer to if you are interested in learning more about those specific parts.
What is sound actually?
Sound can be defined as a mechanical wave. This wave is an oscillation of pressure and can be transmitted through solid, liquid, or gas. By extension, we can define sound as the audible result of these oscillations on our ear.
Our ear, combined with further brain processes, is an amazing...
