Why can't I hear the audio samples?

To listen to the audio sample clips, you need to enable javascript and you need Flash Player. Instructions are below for different browsers.

Javascript for FireFox browsers: Go to Tools in the top menu bar and select 'options'.  Then go to the content button and click 'enable javascript'

Javascript for Internet Explorer browsers: Open your browser (I.E. 7.0)  Click on Tools button (it is located in the upper right part of the screen).  Select Internet Options. Click on Security tab. Click on Custom Level. Scroll down until you see section labeled Active Scripting. Select Enable. Click OK to save changes. Confirm Yes and click OK. Close and restart the browser.

Flash Player:Go to http://www.adobe.com/products/flashplayer/  If you get sounds and animation, then Flash is installed and running.  Otherwise you can install it.