@Mkay - I really feel for you. I would be going absolutely nuts in your situation. Its noise pollution, hand down. There is research showing that intrusive noise can be extremely detrimental to both mental and physical health.
I have stories I could tell about noisy neighbors... .barking dogs, drummers, loud cars... ugh.
I ended up sending an anonymous letter to one neighbor describing several situations with their dog barking excessively (one night they left him out for an hour during a horrible freezing rain storm and the poor dog was squealing in pain/fear the entire time). I was polite, but firm about how the dog sounded stressed and unhappy, and the noise was intrusive. Thankfully (and surprisingly), they've only left him out a couple times in over year since then.
This website might have some ideas for you http://barkingdogs.net/