Entertonement provides some sound samples of Micheal's interviews. Most of MPF fairies must be familiar with this website, but I thought of sharing 'cause I like his voice too. Just for a change...
Source:
http://www.entertonement.com/collections/2197/Michael-Phelps "Starting my... *sighs* 'guess my new life in Baltimore now"
"I've been wanting McDonalds for a long time since I started competing so just a double cheeseburger, a big mac and some fries."
"If he pushes my buttons the wrong way then I push his buttons the wrong way and then we just... that's when we get our little things, our little tizzies."
"I have to work on my stroke."
"It's just so funny."
That's all folks!