On older cars they were simple plastic wraps while on newer ones the protection is also somewhat sound deadening since it s made of foam or fiber materials.
Sound dampening door panels.
Use these panels to block sound leaking through any rectangular or squared opening.
Excellent for windows doors and openings.
A lightweight sturdy and convenient acoustical sound dampening panel loaded with high density insulation enhanced with either 1lb or 2lb density mass loaded vinyl to reduce sound transmission.
Sound absorbing acoustic insulation wall panels 2 pack model 02506 view the owens corning sound absorbing acoustic panels.
Lift the protection under the door panel.
Most cars have another layer of protection under the door panels.
Jqk door stopper sound dampening door stop bumper wall protetor with grey rubber 2 pack adhesive or wall mount brushed nickel stainless steel 4 5 out of 5 stars 34 9 99 9.