I am writing to apologize for the excessive volume that I created during the [event/occasion]. It was not my intention to be disruptive and I understand that my actions caused a disturbance to you and the other guests.
I understand that I should have been more mindful of the volume of my voice and the impact it had on the atmosphere. I am sincerely sorry for my behavior and the disruption it caused.
I am aware that my actions were inappropriate and I take full responsibility for them. I am sorry for any embarrassment or discomfort that I caused you and the other guests.
I understand that this was not the kind of behavior that is expected of me and I am embarrassed by my actions. I will make sure to be more mindful of my volume in the future and I will strive to be more aware of the impact my behavior has on others.
I hope that you can accept my apology and forgive me for my mistake. I am truly sorry for the disruption that I caused and I will do my best to ensure that it does not happen again.