Voices inside my head......

I've just done a really disturbing thing... I was sitting at home practicing my talk for tomorrow and I discovered that Powerpoint will let you record your talk while you're giving it... So, stupidly I tried this. At the end of the practice it attaches whatever you've said to each slide, so when you flip through it again it plays your talk with it... Arrrgh!!!! I don't sound anything like the voice in my head... it really freaked me out (ok, I'm always freaked by hearing recordings of me), still it didn't sound like me... I want to know which version of my voice is real! I prefer the one in my head, so I'm not sure I want to here I sound like the semi-moron recording.