If the neighbor gets noisy after 10PM, callyour apartment manager, and ask him to make the neighbor get quiet. Or call 911 and report excessive noise.

It's your manager's problem, but if you don't let them know, they can't do anything.

911 if for acutal emergencies. Look up the phone number of your local police department and keep it by the phone. Better yet, program it into one of your speed dial buttons.

First off do not assume that he is a threat to your family. I know his pounding scared you but it's just pounding.
You said"he is not very friendly and does not look that i can communicate with him". Have you ever talked to him other than when he was telling you to turn it down?
Sounds like your assuming a lot here.
Think in actual and not what you suppose may be.
There is a solution, you have to find it though.
You know what I mean?
You don't know YET if he is the big bad wolf.
After you have asked him to listen to your dvd play and he sets your eyebrowns on fire..then you know he is bad.
Just look at it from another point of view.
And knowing the non emergency number to the police is a MUST for all.
When you gotta live by a person it is best to try and solve the issues and not make 'em bigger.
I do not mean that your making it bigger...this is just sound advice for all us condo & apt dwellers.
Kill 'em with kindness.

hi ,thanks every one for your helpful response, i have observed this neghour at what time he goes to work, its around. I met him one day right when he out for work . I have introduced myself in a polite manner and apologise in case i have made any noise which disturbed him. I have told him a that i do not play and loud volume and i have disconnected my TV wtith the sound system , i also told him that i ususally watch TV, which i have right to do . Also i have told him that in case if my volume is low , please let me know . This way he understood my presence and i think it seems that he is no more wild now a days. In addition to that i also get along with other nehogurs, just to make sure that they will be with me in case any trouble, in future.
thanks again every one and good luck with all yoru situation , i think opening a Channel with other person can solve lots of issues.

great, johnmm, and congrats on working in a positive way to deal direclty with your neighbor. I hope this attempt of yours to create friendly connection pays off!