basically, perl has nothing to do with playing wav files in a browser. The browser decides whether to (not to) play audio files. AFAIK there are no official tags *) to do this, so offcially you'd need some kind of plugin like flash to do it for you, but a quick google search will help you too.

*) update: as zentara rightly points out, you can use the <embed> tag, but that's not standard HTML; I think the <object> is the closest thing in the standards. I don't know how wide-spread support for it is, though.