some cars have bolts that allow the caliper to slide, and these can sometimes seize also. easiest way to check, is take it apart and mess with it. really weird stuff can happen with noise diagnosis. i had a car come in once that was making a noise and vibration while applying the brakes, and rotating the tires got rid of it. that was prolly just an overtightened wheel, but im just saying, weird stuff causes noises sometimes
now you said its an accord right? if you have access to a jack and jackstands, id say put the front end up on jackstand, with the rear wheels chocked and take the wheels off. put the lug nuts back on so the rotor cant come off and put the car in gear, drive whatever and apply the brakes and see if you can figure out your noise.