As soon as you visit this page you will hear an audio clip being played. This is done by the AudioImage applet that is embedded in this page. Clicking on the page steps through the list of sounds that are available. If you want to add your own sounds, then create the sounds as 16bit, 8KHz ".au" (Sun/Next) format audio files, and then add their names to the applet parameters.
The picture is of tennis superstar Steffi Graf and the copyright belongs to Sports Illustrated