Everyone hears themselves differently on a recording. No one else hears your voice the way you do. When you speak, you hear vibrations through the bones in your head AND vibrations through the air. Everyone else only hears the ones through the air. The way you perceive your own voice is unique to you.
Science!
http://www.scientificamerican.com/article/why-does-my-voice-sound-different/
Hmm not bad I'll make an Instagram video of it
*sings for video*
*listens*
*throws iPod away*
Science!
http://www.scientificamerican.com/article/why-does-my-voice-sound-different/