Abstract
When verifying the measure against control of the squeal in a car disk brake, the manufacturers have investigated using the actual car and using the dynamo which took out only the brake unit. In this paper, in addition to two experiment dynamos installed a brake unit by the different method, it experiments in squeal using the actual car, and these common features and differences are clarified. Moreover, the measure against control of the squeal common to these is verified experimentally, and the validity is shown by proposing the general measure against control of the squeal in a different vibration characteristic.