Laboratory and Vehicle Characterization of Front Disc Brake Squeal 830531

A drag test method for the quantification of front disc brake squeal which uses a brake dynamometer and noise analysis equipment was developed and previously reported in SAE Paper 820037. Subsequently, the dynamometer procedure was revised to a variable stop method which allows a wider study range in less test time while still providing sufficient information to determine the noise character influence of design changes. In conjunction with this revised dynamometer operation, a systematic vehicle test procedure was developed to more clearly define vehicle/dynamometer noise character correlation and in-vehicle noise sensitivity.


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