When the mailman passes or the neighbors kids, the dog
barking and running at the fence or at the gate.
If you're a dog owner that doesn't like that, order the
Onfencive sprinkler system.
The simple version detects the barks and starts up with the
typical sound of a sprinkling
system. After a few times, the
dog will avoid jumping on the gate. Especially if the water
tinged with a nice sweet smell.
Then higher-end version has several extra features:
* Detects the location of the barks and only sprinkles the
where the dog is in, and only when it's barking.
* Can detect the barking dog's location and spray it
anywhere in the yard while it's barking.
* Can have an audio message connected to its operation,
with a message in the owner's own voice.
* Can work without water and only with sound simulating
the spraying sound in the dog's ears.
This is different from the scarecrow system (see link) in
it's specific for fences or gates and barking dogs.
It is also different from the anti-pet-sprinkler idea because
we aren't saving furniture, but rather preventing the scary
barking and gate/fence attack show whenever unsuspecting
bypassers walk past your house.