Anything that will *distract* a dog is quite effective in training them to stop barking; in the dog training classes I've taken, they used smoke detectors, an empty 2 Liter pop bottle (hit your thigh with it - makes a loud, distracting noise aka "Hand Thunder"), any noisemaker. When you detect a bark, make a noise that distracts the dog, immediately after they bark - you really don't need it to be painful, just distracting enough that the dog's motivation to bark is removed, as they'll get distracted reliably when they bark. (It feels good for a dog to bark, same as it feels good for a child to yell loudly. Less fun for the child if you squirt them in the face with a squirt gun each time etc. ) Something just a little jarring will remove the fun of barking, you probably could do it with a ultrasonic whistle if you sat up for a couple nights and were ready to blow the whistle each time the dog barked. Consistency (distracting them every time, very quickly) is good. Or electric noisemaker & sit up with a finger on the button Perhaps a better solution: Talk to the owners and if that doesn't work, escalate to the local police - usually there is a law against disturbing the peace; the owners may be pretty interested in getting their "problem dog" to not keep THEM awake all night They could solve it perhaps easier than you could, in part due to 1/r^2 Mark Grant Forest wrote: > Goodday, > Anyone have a sonic circuit that can be used to stop a dog barking. > Have searched the net and still looking. > Tks > Grant Forest > (always awake as the nextdoors dog is always barking) -- I re-ship for small US & overseas businesses, world-wide. (For private individuals at cost; ask.)