When the material starts to wear away the small piece of metal is exposed to the brake disk. When the brake pads press against the brake disk so does the metal. The metal vibrates creating sound waves. The vibrations should reach the ear of the person driving. These vibration are typically at a high frequency. The high frequency is generally a “squeaking” sound that is designed to be annoying to many people. The sound usually is loud enough for the driver to hear. This means the amplitude of the sound wave needs to be large enough to be heard over the sound of the engine. The more the brake pad wears down the louder the sound becomes, signaling it is time for new brake pads. This little feature helps brakes from failing and hurting
When the material starts to wear away the small piece of metal is exposed to the brake disk. When the brake pads press against the brake disk so does the metal. The metal vibrates creating sound waves. The vibrations should reach the ear of the person driving. These vibration are typically at a high frequency. The high frequency is generally a “squeaking” sound that is designed to be annoying to many people. The sound usually is loud enough for the driver to hear. This means the amplitude of the sound wave needs to be large enough to be heard over the sound of the engine. The more the brake pad wears down the louder the sound becomes, signaling it is time for new brake pads. This little feature helps brakes from failing and hurting