Entitled Brother insists that he is not loud

I have posted about my entitled brother (Dio) on this subreddit before,

Earlier today my parents were discussing with Dio as the dinner table that he always talks on the phone with his’ friends at night, the problem is that he talks way too loudly and always wakes us up (especially me), this has been going on for over 2 years now!

I swear, this man(child) is 27 and a half years old and yet he has no idea what an indoor voice is, everytime we tell him that he is being loud he insists that he is NOT loud and gets offended at us for complaining and comes up with excuses which basically say that he has a right to be this loud at night, the worst part is when I (tired AF) go to the bathroom and overhear his’ conversation through the walls because this guy has an unhealthy obssession with “passionate hugging” and he talks about it a lot and sometimes makes roleplay noises when talking about it.

the only reason why my parents haven’t kicked him out is because they’re too nice, if they’re gonna kick him out they want to at least make sure he has a place to live.

Methods I have tried to use to blot out the noise: Earplugs (doesn’t work, his’ loudness bypasses them), sleep in a room further away (doesn’t work, I can hear him from the other side of the house, literally), Noise-Cancelling Headphones (He bypasses them regardless, HE IS LITERALLY THAT LOUD)

Coping Mechanism: I have begun (since last year) making “Diaries” of sorts, where I post fun facts on Facebook usually about sleep, loud noises, nocturnal animals etc. (though I’ve had to think outside the box because I was beginning to run out of ideas because of how often I post them), after a few months Dio finally learned what I was doing and he did the most mature thing he is capable of; getting offended like a little kid and deciding to copy what I was doing in spite of what I am doing