Porting directs a jet of hot gas up (or at a slight angle from straight up), 90 degrees from the direction it usually travels (downrange). This gas jet counteracts some of the recoil effect to help hold the muzzle down. That same hot gas is what makes all the noise. Now, instead of all of it starting out going downrange, some of it is pointed up, a lot closer to your ears, more so for the folks standing next to you. That is one reasone why some people really object to ported guns.
And their aint no dumb post, we all gotta learn sometime. Stick with this and 20 years from now you will be answering questions for somebody else. :-)