The most effective additional detail to add to paragraph 3 would be:
“It appears that just a few residents have been causing most of the noise at night.”
This detail is effective because it addresses the opponents' concerns about the enforcement of the ordinance and provides a specific context regarding the noise disturbances, suggesting that the problem may not be as widespread as implied. This information could help balance the argument by indicating that the issue might be manageable without broad restrictions, highlighting the perspective of those who feel their rights may be infringed upon.