Abstract: A friction material for a brake pad is disclosed which is used in a brake system to attenuate noise generated during a brake application. The friction material has double chamfers on its leading and trailing edges which extend from an engaging surface. Each of the double chamfers has a first surface area located in a first plane and a second surface area located in a second plane with respect to the engaging surface. The first surface area and the second surface area intersect to define an engagement contact edge where the friction material initially engages a rotating member such that path through which frequencies generated during a brake application are changed resulting in an acceptable noise level during a brake application.

Abstract: A method of attenuating audible sounds generated during a brake application through the engagement of a friction member with a rotating member. The brake is evaluated by modal and frequency response analysis to determine the natural frequencies generated during a brake application and identify the natural frequencies that create audible sounds. The locations on the friction member are identified which are most sensitive to generate audible sounds. Thereafter, portions of the friction material at the most sensitive locations are removed to change the natural frequency and attenuate the development of audible sounds.