Hey,
Couldn’t see if you had written the age group of the kids you teach.
Obviously the certain students who are making these noises and wriggling are doing it unintentionally.. Perhaps you could set up a system for them, give them brain breaks when they get to that point of restlessness, a couple of minutes away to refresh themselves so they can come back.
I work in the primary years and this really works for them.. Also, having fidgety objects for them, theres certain types of chairs you can get now specifically made for kids with ADD where they have little balls on the bottom of the legs, so the kids can move around to help them concentrate.
Hope this helped at all!