I think you've answered your own question

you are playing right into his paws! Pop round to see the neighbours or invite them round for a chat and to meet doglet (sorry you didn't give his name) and explain the problem you are having. Ask for their help and support for a couple of weeks; say you will even buy them earplugs if they will agree!

Then sit it out, let him howl, whine or bark but just ignore it, you know he is warm, toileted and fed. Eventually, just like the child who is constantly "attention seeking", when ignored he will learn to settle.