People are more important than pets. The OP's neigrabroadours lives are being disrupted by the OP's dogs barking. This is not acceptable and I personally believe that the dogs dont like being cooped up in the flat whilst the OP works.
Bringing in straw man arguements that no flat owners should be allowed AV gear and children is childish and flawed in the fact that noise laws exist against noise from AV gear, children and bugger me sideways, barking dogs - the op is not being picked on because he lives a flat!
Once again, It's my belief that dogs need more open space than can be provided by a flat when left to themselves and I believe this is contributing to the barking. I could of course be completely wrong, however, since none of us speaks "dog" we'll probably never know.
I have no issues with the OP, dogs orflat owners etc and I hope it gets sorted to everyones benefit, but you can't stop me believing that dogs need more space than can be provided in a flat.
Finally, I know of many large detached houses also unsuitable for dogs...gardens of size are few and faw between in some urban areas (especially in London).
To the OP, I hope you get this sorted!