When engaged in a conflict to reroute the overhead planes or restrict the expansion of an airport, smaller victories along the way often sustain individuals for the longer battle. All of us should expect a little noise is our lives, especially those who live in crowded, urban environments. If you conclude that most people would be bothered by the noise, then you are right in deciding to do something to curtail it. It would be helpful to provide materials indicating that noise is now considered a health hazard. If those in charge don't help resolve the problem, then contact the environmental agency or the police department.
Some towns have mediation boards to handle neighbor complaints.
Local public officials can also be asked to assist. As a last resort, seek legal redress, factoring in the cost. If the noise emanates from a neighborhood establishment, then others are also being bothered by the noise. Knock on some doors and ask neighbors to join you in forming a group to act on the problem. Then as a group contact the owner or manager of the establishment disturbing the community.