Write a letter to your neighbours. In your letter
explain the reasons for the noise
apologise
describe what action you will take
Dear Mr Jones,
I am writing in response to your letter, complaining about the sounds my musical instrument is producing. I feel that I have to explain myself and humbly ask for your forgiveness.
Actually, I am a student of the North Carolina Arts College and as a part of my end of term exams I have to perform 4 plays by flute. Therefore I have to reherse every day because I am eager to make a good impression to my teachers. To achieve my goal I am supposed to play about 3 hours a day.
I must apologize for playing in inappropriate hours. It was all my fault since I did not bother reading the rules of our house owner, prohibiting playing musical instruments.
I have consulted with my class teacher and he suggested me to use one of the rooms of the college to reherse for a small fee. I assure you by no means will be disturbed again with the noise from my appartment.
I beg for your understanding and forgiveness. Please, accept this box of chocolate as a token of my appreciation for not giving this problem a legal action.
Yours sincerely,
Anna Frank