When .wavs have been compressed with MP3 compression, they require you to have certain programs and/or codecs to hear them. If you're using Windows 95/98/NT, read the next section for more detailed info. If you're using a Mac, you can use SoundApp. If you're using another operating system, please read the MP3 WAV page at Sound America.
Please note that it might be necessary to download the wavs to your computer to play them. If clicking on the wav links doesn't prompt you to save the file to your hard drive, then you'll need to right click on the wav links and select "save link as" or "save target as" from the little menu that pops up. (*I've had visitors who've had problems when just left-clicking on the links -- another program tried to play the wavs, but couldn't. So, unless you want to go check your file associations -- which should only be done if you know what you're doing, right-clicking is the way to go.*) I can't help you in any manner with these files, other than the info posted here -- so, please, don't ask.
Well, you have several options.