It's fine to post them in this specific forum - people often post samples for others to evaluate.
You'll have to just provide some kind of link other than the actual file. Here are a few options, but of course there are many more.
http://vocaroo.com/ - You can record directly from their web app or upload files. Afterwards, you'll be given a link to post directly to the recording.
www.goear.com - I think this one requires you to install Shockwave or some other software.
Finally, you could always post it on Youtube, even if it's just audio with a picture.
Interested in Language