Does anyone else hear a whistle when they talk but not when they sing?

[Moniker 93]

Hi, I seem to have noticed when I speak that I whistle sometimes I don't get why, it could be that I am short two teeth in the front and have two gaps, but I notice it's not as noticeable when I sing, I wonder does any one have the same problem?

[Treble Bolt 1,122]

I get that when I go from an S to a P sound most often.  It's very strange since I have large front teeth.  Although I do have a bit of a lisp and hearing myself through a phone message really makes me think I constantly sound congested or something....

[Rave Crocker 49]

its most likely because people tend to talk with their teeth more closed and when you sing your mouth opens allot more to get more notes out.