An applause sound should play automatically each time this page is loaded,
and a control should be provided to play another sound.
But in IE9, I find that the sounds only play if I first link somewhere else
such as
http://www.google.com
and then press the browser's Back button.
Further, if I then Reload the page,
it goes back to not working.
(If it works for you the first time, try a Reload.)