Basil Chupin wrote:

Now, every time the dog runs up and down the fence barking, chuck the
length of chain against the fence about where the dog is. The chain
hitting the fence makes a loud "ringing"/clanging noise (you'll know
what I mean the first time you do it) and this gets the attention of the
dog as well as frightens it. As you throw the chain yell out, "Quiet!"
or, as trainers usually say when training dogs, "NO!". You will find

I'm a very peaceful person

I don't think chucking chains at the fence at the neighbour's dogs
would help our relations.

As an alternative, is there some sort of dog whistle which can be used?
Something which a person might not hear, but would get the attention of
the dog enough to 'punish' it for barking?