This procedure is applicable to high frequency squeal type noise occurrences for passenger car and light truck type vehicles that are used under conventional operating conditions. The procedure does not encompass the consequences associated with changes in environment related to temperature and humidity variations. This recommended test practice is intended to establish a common universally recognized method for performing a series of screening test sequences that identify the propensity of a brake assembly to generate squeal noise under a variety of test conditions.
SAE J2521-2003 history
2022SAE J2521-2022 Inertia Dynamometer Brake Squeal Noise Test Procedure for Vehicles without Regenerative Systems
2013SAE J2521-2013 Disc and Drum Brake Dynamometer Squeal Noise Test Procedure
2006SAE J2521-2006 Disc and Drum Brake Dynamometer Squeal Noise Matrix