Looking for a Device to Block 100% of All Sounds : I'm talking Absolute Pure silence, like I'm Deaf, like All Human Activity Stopped , like Time Froze.

Like the title said, I'm looking for a way to 100% block all surrounding sounds to allow me to focus when I'm in public transports

I insist on 100% zero sounds, something that even if they're screaming at me I don't hear nothing

The same way you can shut your eyes, you should be able to shut your ears

For me, the annoyance comes less from the sounds and more from the disrespect, I can focus in a bar if everyone is shouting and slurping loudly caus that's acceptable in a bar, but it becomes very hard to focus when a single guy talk on the phone in the train, even with the combo "earplugs + noise reduction headset" I can't focus if I hear the teeny tiniest glimpse of sound coming from the asshole. (And I'm getting tired of scolding them each time)

I've tried construction headset, general earplugs and a 150€ headphones with noise reduction. Having both earplugs and headphones is good but nowhere near enough.

When I get my new job I'll try the custom-made ear plugs.