car run good but has a little vibration idle or running

if the vibration is on acell it could be a bad inner cv joint. if it is a freeway speeds it could be a wheel out of balance. if it there when your braking it could be a warp brake rotor.

Vibration that results in speech is a function of the vocal cords within the larynx. When air is pushed from the lungs through the vocal cords, they vibrate and create sound waves that form the basis of speech. The vibration frequency and how the vocal cords are manipulated determine the specific sounds produced.

damaged/ worn brake rotors.

Balancing of tire/rim.