I think this is a great line of inquiry, and one that deserves our careful attention. Here are my thoughts:

Niggers are only concerned about themselves, and in the immediate here and now. Making a lot of unnecessary noise or speaking in a loud volume is just another facet of the anti-social behavior which has tied the nigger to savagery. Other facets of this anti-social behavior would include things such as:

1) No respect for private property rights. Every nigger will steal, and they are destructive by nature (that's why coon town looks torn up no matter where in the world you are).

2) No empathy for the circumstances of others (niggers are soul-less in this regard).

3) No ability to plan or comprehend the future. A nigger doesn't have the mental wherewithal to understand the cause and effect relationship between what does now and how that will effect it an hour, day, month, or years later.

4) Need for immediate self-gratification. This is closely related to #3, but a nigger can't do without now for the benefit of itself later. This is why they quickly blow their welfare checks or EBT benefits on expensive cuts of meet and junk food, only to be doing without just a few days later.

5) Constant need for attention. They have to be recognized individually no matter the setting. This is why niggers complain or demand special treatment in restaurants. It is because they have to receive constant recognition. Nigger restaurant complaints are very closely tied into the same nigger desires that also make them pursue cheap "bling" jewelry, carjack over "shine rims", or shoot one another dead to get the latest basketball nigger's shoes.