Be warned I have had friends who have used that device who have had tied
those devices only to cause all the dogs in the area to howl.
I would try the talking to the neighbors and if that doesn't work, which it
most likely wont, people who leave their dogs outside to bark and bark
aren't always the friendliest, you could try calling animal control.
They will serve notice on the neighbors about the noise.

"Victor & Toni Jo Friedmann" wrote in
message ...
Does anyone know of a sonic device that operates to 100 ft to discourage a
neighbor's barking dog?

vic