Use a soundproof blanket.
Soundproof panel door.
The kind you choose will depend on the type of door you re dealing with.
To make your door more soundproof you need to seal it properly a good method od achieving this is to use magnetic door gaskets.
Door gaskets are commonly used on fridge freezer doors to ensure an airtight seal.
Acoustic door blanket panels overlap the door and extend beyond the frame to prevent acoustical leaks.
These do the same thing as weatherstripping they seal the door frame but they do it far more efficiently and effectively.
Use acoustic or.
They have a cut out for the door handle slits to fit around the hinges and velcro sewn onto the back for quick and easy installation.
Soundproofing doors is easier when you understand the acoustics involved.
Siless 12 pack acoustic panels 1 x 12 x 12 acoustic foam studio foam wedges high density panels soundproof wedges charcoal.
Soundproof door sweeps are items you attach to the bottom of your door to bridge the gap between it and the floor.
Though they can be costly soundproof blankets which are typically fiberglass absorb sound.
Then seal the gaps with a door gasket door sweep or spray foam to prevent air leaks.
They can be made of metal and rubber or just rubber or soft foam and fabric.
How to soundproof a metal door add door thresholds.