The following lines were added (+) and removed (-):
The problem with commercially available ultrasonic dog barking deterrents are they lack sufficient intensity and range to be effective against a neighbors barking dog. Although the dog next door might be able to hear the device, it would be the equivelent to a human hearing a wind-chime. The dog might respond at first, but merely out of curiosity then simply ignore the sound in some cases even become accustomed to it and enjoy it. The problem with commercially available ultrasonic dog barking deterrents is they lack sufficient intensity and range to be effective against a neighbors barking dog. Although the dog next door might be able to hear the device, it would be the equivalent to a human hearing a wind-chime. The dog might respond at first, but merely out of curiosity then simply ignore the sound in some cases even become accustomed to it and enjoy it. Commercially available ultrasonic dog barking deterrent = pleasant wind-chime to the dog next door.* Commercially available ultrasonic dog barking deterrent = pleasant wind-chime to the dog next door. Again, these devices might have an effectiveness on your dog at close proximity when properly used, however, are completely ineffective at any appreciable distance beyond a few feet. == Online Resources == Here is an individual that has spent time doing testing as well as coordinating with others over tackling this problem* [http://www.youtube.com/channel/UCcA8w_6l3aSsRON_arLkVlA spaceman234100] A discussion on "Instructables" by myxpykalix * [https://www.instructables.com/community/Make-a-ultrasonic-Dog-Barking-machine/ Make a ultrasonic Dog Barking machine]