Do most people sometimes (or at least on rare occasion) say something in a tone of voice that they didn't intend?

Example: You are feeling happy and try to say something loud, it comes out sounding irritated (possibly because of the strain to your vocal cords), even though you don't feel that way and didn't intend it to sound that way.

IMO, this reflects badly on a person even if it happens rarely. Let's say it happened in front of a group of coworkers and supervisors you are just getting to know. What can be done? (I think it might be best to just let it go and try to be more self aware next time.)