There is a new "Anti-Noise" law in place in the City of Dallas that was inacted about 2-3 years ago. If there is ANY noise that you can hear from 30-60 feet away, approximately, no matter what time of day or night, that is against the law. The problem is that when you call 911 about it, this problem is at the bottom of their tier level system and keeps getting bumped back when other more important calls and/or a higher tier call is placed. It has been my personal experience that it usually takes around 4-9 hours or more before they respond to your complaint at which time, the "noise" has ended so their report says, "no noise found". If there isn't any "noise" found, then the records don't ever show there is an ongoing problem and doesn't get the higher ups attention, unfortunately.