These kinds of sliding doors are designed to have a strong feel to the touch.
Thing to slide under door for less noise.
If possible stagger doors along a hallway and arrange their swing so that they don t bounce sound into adjoining rooms.
Get a heavy fabric drape and hang it from the rod.
They come with a plastic interlayer between two panes of thick glass.
I d start by fortifying the space between the door frame and the wall with some acoustic.
Avoid sliding bi fold and pocket doors that not only make noise themselves but also don t seal as well as the swinging type.
So if you are willing to go deep in your pocket the taste is yours.
Place acoustic drapes over the door.
In addition plugging the gaps in the door is essentially the best thing you can do to prevent the noise from coming in as well.
To soundproof a door make it structurally strong enough to block noise by replacing it with a solid core door or by adding mass loaded vinyl soundproof blankets and panels to the existing door.
When planning for new doors and windows also consider where sound travels.
Double glazed sliding glass door is an expensive venture.
Magzo under door noise stopper 30 x 3 inch weighted sliding glass door draft blocker white noise reducer heavy duty seal guard saving energy sound proof 4 5 out of 5 stars 2 394.
You can purchase drapes that are made out of sound dampening fabric.
Then seal the gaps with a door gasket door sweep or spray foam to prevent air leaks.
They cost in the excesses of 3000.
When you are inside the room simply slide the drape into place for less sound from outside.
So having something under your door even stuffing a towel in the gap should significantly decrease the amount of noise.
Install a short curtain rod directly over the back of your door.