Press the following buttons to see what affect different frequencies have on the sound

These sounds are not much like a musical instrument. This is because musical instruments like guitars actually make lots of sounds when one of its strings is struck. The way the string is mounted in the guitar means that its motion is actually quite complex. Indeed, it is this complexity that helps us to identify the sound of a guitar when we hear it.

In 1822 Frenchman J.B. Fourier showed that any sound could be re-created by adding sine waves together. Press to find out what happens when you add a 100 Hertz sine wave to a 300 Hertz sine wave.

Press to find out what happens when you add a 100 Hertz sine wave, a 300 Hertz sine wave and a 500 Hertz sine wave together.

To explore the idea of making up sounds by adding sine waves together further, this web page and run the Dotric Sinewaves program. To run the Dotric Sinewaves program now click here and press the

To find out more about the Dotric SineWaves program click here.

If you are really interested, you might like to download the DotricDJ program, capture some real life sounds (like a guitar) and look at the waveforms that you get. To find out more about the DotricDJ program click here.

Now that you know all about sine waves proceed to