Sound Proof Doors are available with an STC Rating of up to 60. They range from small walk-through doors that are fitted with automatic seals and internal insulation, to concrete "elephant" doors used in movie studios and testing facilities. These doors can suppress or block noise from machinery, background, traffic or any other undesirable sounds. Security and weather resistant features can be incorporated. Dual glazed glass panels reduce the level of sound transmitted through a storefront door. They are available as overhead, swinging, horizontal sliding or any special application needed.