We had the same problem about 17 years ago..but a lot of it was animal noise. They continuously kept at lest 8 dogs...and they ALL barked. The problem worsened about 11 years ago. Now the have a German Shepard that rushes you at the fence when you get out or is at the fence where my chickens are.I'm smushed between a crazy dog lady and ignorant arrogant motorheads. The best thing is to move but in this market I'll take a huge loss or sit on it forever.
We where faced with the same solutions as you....sale and move or come up with a plan. Animal control helped with some and a privacy fence helped a lot. We have been slowly putting up privacy fence. It is costly and we do a little bit as we can afford it. The next area is where my chickens are. It won't help the noise but you feel better...just make a little world of your own. It is sad where the police really don't/can't do anything about the harassement which I feel this is. I hope things work out for you cause I know how irritating it can be and not being able to get anything done leaves you feeling helpless.