Door Plugs for soundproofing a door are custom cut QBS sound control blankets that match the dimensional size of the back of your door.   These acoustic door covers are custom cut to your door size including cutouts for hinges and your door handle.   Use our Door Plug Worksheet to fax us the dimensions of your door.   The Door Plug is attached via velcro to the backside of your soundproof door.    For insulating a door against door noise bleed, these door sound insulation blankets can block up to 90% of the noise bleeding through your door.