Squeaks & Rattles

Basically, squeaks and rattles are caused by improperly controlled relative motion between components. There are three means to prevent squeak and rattles.
^ Attach components securely so there is no relative motion during operation.
^ Separate components so there is no contact under operating conditions.
^ Insulate components so no sound occurs with relative motion between components. Low uniform friction surfaces can be provided to eliminate a stick-slip motion.