A Study of Knocking Noise in Disc Brake System and Its Elimination


Jeevan Kizhakkekalayil
Sagar Malape
Anand Wadodkar
Raajha M.P.


In the automotive industry, elimination of Brake Noise is a tough challenge. In Past, extensive research and investigation has been done to eliminate brake vibrations/noises and improve vehicle comfort. Disc Brake noises are broadly classified into Squeal noise, Groan/moan, Judder, Wire-brush/Chirp, Rattle etc. These are mainly friction induced vibrations. Lots of study has been done already in characterizing and eliminating these friction induced noises. Apart from these, instantaneous noises (knocking/hitting type) are also observed in Brake System. This paper deals with the study and elimination of such an instantaneous “Knocking Noise” observed in Front Disc Brake system of a Passenger SUV vehicle.

Keywords: Disc Brake Noise, Knocking Noise, Brake Pad Shim, Pad – Bracket Clearance, Acoustic Mapping, Disc Brake Noise Acquisition


How to Cite
Jeevan Kizhakkekalayil, Sagar Malape, Anand Wadodkar, & Raajha M.P. (2022). A Study of Knocking Noise in Disc Brake System and Its Elimination. ARAI Journal of Mobility Technology, 2(4), 418–426. https://doi.org/10.37285/ajmt.2.4.10


  1. Amr M. Rabia, Nouby M. Ghazaly, M. M. Salem, Ali M. Abd-El-Tawwab, EXPERIMENTAL STUDIES OF AUTOMOTIVE DISC BRAKE NOISE AND VIBRATION: A Review, International Journal of Modern Engineering Research (IJMER), Vol.3, Issue.1, Jan-Feb. 2013 pp-199-203 ISSN: 2249-6645. Page 2
  2. Xu Wang, Sabu John, He Ren, A STUDY OF SQUEAL NOISE IN VEHICLE BRAKE SYSTEM, IMECE2011-62084, Proceedings of the ASME 2011 International Mechanical Engineering Congress & Exposition, IMECE2011, November 11-17, 2011, Denver, Colorado, USA. Page 2