07 NOV 2013 by ideonexus

## Fourier Transformations

So what was Fourier’s discovery, and why is it useful? Imagine playing a note on a piano. When you press the piano key, a hammer strikes a string that vibrates to and fro at a certain fixed rate (440 times a second for the A note). As the string vibrates, the air molecules around it bounce to and fro, creating a wave of jiggling air molecules that we call sound. If you could watch the air carry out this periodic dance, you’d discover a smooth, undulating, endlessly repeating curve that’...**Folksonomies:**mathematics

**Folksonomies:**mathematics

It's like prism that breaks apart the components of a sound wave or image into it's smaller parts.