Request him tactfully to lower the volume as it disturbs you while you are studying for the examination.
7G, Rainbow Colony,
1st February 2014
Dear Mr. Jamal,
You have always been a very kind, considerate neighbour to us, and I am very really sorry to have to write this letter to you. I am sure, however, that you will not misunderstand me.
As you are possibly aware, I am busy preparing for the S.S.C examination. The loud noise of your TV disturbs me and I find it very difficult to concentrate on studies. Perhaps you may not be aware of this when you are watching TV, especially during the late hours at night. I will be greatly obliged if you could kindly instruct your family members to turn down the volume of the TV set.
I am sure you will understand my problem and comply with my request.
I am really sorry if you feel offended by this note, but let me assure you once again that no offence is intended. This is just a friendly request.