You can purchase a new insulated garage door that provides both thermal and sound insulation.
Garage door sound dampening.
Imagine what a task it would be to soundproof that.
In any room the door will be the weak link which will easily let in or let out sound.
Replace old doors with insulated doors.
Garage doors are huge.
Works with all overhead types of garage door opener that are bolted to support brackets.
A garage door silencer work by decoupling your automatic garage door opener from your ceiling thereby significantly dampening vibrations and using up sound energy before it gets into the upstairs room.
Then there are gaps on the sides on the top and on the bottom of the door which will let out a lot a sound.
If you regularly use the door and cannot to block it off you can install a curtain rod above the garage door and hang a soundproofing material such as mass loaded vinyl mlv or an acoustic quilt.
Constructions can range within garages from something as simple as applying sound proofing to the existing shell to building a room within a room construction.
Mounts between the garage door openers motor head mechanism and the support brackets.
And a garage door is the worst type.
Since this item has two independent isolated bolts molded to the rubber it provides for maximum isolation of noise and vibration created by the garage door opener motor head.
Another way to keep sound from escaping through the garage door is to replace the doors with insulated doors.