Jack the wheel up. On an undriven wheel simply spin it and it will be obvious if the pads are binding as there will be a noise and resistance to turning.
On a driven wheel it isn't so easy. Compare the thickness of pads on either side of the disc and each wheel. If a pad is thinner than the others then there is a good chance that the pad is rubbing against the disc. This applies to undriven wheels as well.
Severe Binding is: How Large is the bump on the top of your head and the number of cracks in the windscreen?
Ocasional Sticking is: How many bruises are on the bridge of your nose?
Grinding noises is: How many sand dunes have you driven through today?
Chirping noises is: A low flying flock of Black Birds that didn't quite get out of your way!
Meow sounds is: Looks like you have some explaining to do to your neighbor.
The remaining noises can ONLY be answered by a female as they alone have all the answers!!!