This is a kind of Yahoo secret. Open either Internet Explorer or Opera coz it wont work with Firefox. Now in the Address bar of your browser type yahoo.com so that you will be directed to Yahoo homepage.

Turn your speakers on with full volume to hear the secret. When you are in the homepage, mouseover on the ! in the “Yahoo ! ” Logo at the top left side of your homepage. i have marked in the screenshot above. Now just click on ! in the Yahoo logo, you will hear Yahoooooooooooooooooo……Sound.

Amazing isn’t It ?

Thanks PD.