SAE J2521-2013 PDF

Scope: The SAE J2521 procedure is applicable to high frequency squeal noise occurrences for on-road passenger car and light trucks below 4,540 kg of GVWR. The procedure incorporates high temperature and low temperature test matrixes, but does not fully account for the effects of the environment on brake squeal. Much research is currently underway in this area and can potentially be incorporated in future revisions. For the purposes of this test procedure, squeal is defined as peak noise levels equal to or above 70 dB(A) between 1.25 kHz and 16 kHz for tests using a full suspension corners or full axle assemblies, or between 2 kHz and 16 kHz for brakes not using a

SAE J2521-2013 Referenced Document

SAE J2598-2012 Automotive Disc Brake Pad Natural Frequency and Damping Test
SAE J2625-2008 Automotive Vehicles Brake Squeal Test Recommend Practice
SAE J2786-2009 Automotive Brake Noise and Vibration Standard Nomenclature
SAE J2789-2010 Inertia Calculation for Single-Ended Inertia-Dynamometer Testing
SAE J2933-2011 Verification of Brake Rotor Modal Frequencies
SAE J3001-2011 Brake Insulator Damping Measurement Procedure
VDA 305-2013 EKB 3008 data exchange format
VDA 306-2013 Definition of charts for the evaluation of brake noise data/ Dynamometer (EKB 3009)

2022 SAE J2521-2022 Inertia Dynamometer Brake Squeal Noise Test Procedure for Vehicles without Regenerative Systems
2013 SAE J2521-2013 Disc and Drum Brake Dynamometer Squeal Noise Test Procedure
2006 SAE J2521-2006 Disc and Drum Brake Dynamometer Squeal Noise Matrix
2003 SAE J2521-2003 (R) Disc Brake Dynamometer Squeal Noise Matrix
2001 SAE J2521-2001 Disc Brake Dynamometer Squeal Noise Matrix