I have had this going on for about 3 weeks or so. when I apply a certain pressure on the brake pedal I get the most annoying noise in side the cabin of my voy. I did my brakes last year at some time.(brakes,fluid,rotors the works all of it) A few day ago I changed out the vacuum booster check valve just to see if it's Maybe coming from there and that wasn't it. The brakes definitely do there job 100% never an issue.