inviot manufactures soundproof interior doors. Our recording studio doors have an STC value up to 56. The Studio 3D soundproof doors are ideal for recording studios, offices, band rooms, hotels, dorm rooms, conference rooms or any application where a soundproof interior door is required. The soundproofing doors come standard in oak, ready to stain with silver hardware. Custom finishes and hardware options are available for this door sound insulation product.