Here is a website that's called VOON; here, you'll be able to record voice/sound up to 10minutes.
Of course, FOR FREE!!
Since the website is in Japanese, it's gonna be difficult for some people, but it only requires an account-making and to have a microphone that you might have for talking on Skype.
That means you only need to have a small headset!!
Why don't you try? ;)
Here, there is a English website that enables you to record your voice; that is Vocaroo!
All you have to do is to click "Record" and speak to your microphone, just like Voon website! ;)
I think I'm gonna do some experiments using this awesome shit and show it to you later on...