Dog Silencer™ - Ultrasonic Bark Control Stops Dog Barking Humanely

My wife bought a sonic dog barking deterrent device that operates on 9 volt batteries
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Tabletop or free-standing ultrasonic deterrents stop your dog's excessive barking. When your dog or your neighbor's dog barks, the collarless unit emits an annoying high-pitched sound that discourages your dog from barking. Enjoy a quieter, happier home and yard in only a few days.
Sonic Trainers 146244: Dog Barking Deterrent Outdoor Ultrasonic Bark Silencer Stop Noise Stopper Train BUY IT NOW ONLY: $47.95
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Repel unwanted dogs or stop your own dog’s unwanted behavior with OnGuard™. This handheld deterrent works by emitting ultrasonic sound. The high-pitched noise is silent to you but really irritating to dogs. Now you can repel approaching dogs on your walk, run or bike ride or use OnGuard™ to stop your dog’s unwanted behaviors like jumping on furniture and barking at the door. Sonic Trainers 146244: Dog Bark Deterrent Outdoor Ultrasonic Silencer Stop Barking Control Train Device - BUY IT NOW ONLY: $40.24 on eBay!
Photo provided by FlickrSonic Trainers 146244: Dog Bark Deterrent Outdoor Ultrasonic Silencer Stop Barking Control Train Device BUY IT NOW ONLY: $41.76
Photo provided by FlickrSonic Trainers 146244: Dog Barking Deterrent Outdoor Ultrasonic Bark Silencer Stop Noise Stopper Train BUY IT NOW ONLY: $47.95
Photo provided by Flickr
High-pitch ultrasonic sounds usually are activated when a device hears barking, when triggered by a barking dog's vocal chords via a dog collar, or when the sound is manually administered by an owner when barking begins. The premise is that the dog will take notice of the sound, yet not be hurt, and that its repeated application will become a deterrent to nuisance barking. Devices may be located in a house, yard or kennel or directly attached to a dog's collar.The larger Bark Genie, which has a 50-foot bark deterrent range, automatically emits an ultrasonic sound that only dogs can hear whenever a dog barks.Some dogs -- such as elderly dogs with diminished hearing -- are simply unaffected enough by ultrasonic noise to make its application an effective bark deterrent. Additionally, careful training must be in place for a dog to associate the trigger of sound with the unwanted barking. Used incorrectly, such devices have the potential to frighten or scare a dog without helping him make the connection between the barking and the unpleasant sound. According to Drs. Horwitz and Landsburg, quiet command training or retraining should take place simultaneously. Barking is a natural instinct for your dog. It’s also natural for you to want some peace and quiet now and then. Simply turn on the collar or ultrasonic deterrent when you want your dog to stop barking. Every time your dog barks, your dog will hear or feel a safe, effective correction that reminds him not to bark.I want to get one of those sonic deterrents that activates when the dog barks. Preferrably the most powerful one. I want this dog to realize barking is not in it's best interest. The Birdhouse. The Bark Box. The Stop Barking Device. Whatever you call it, PetSafe ultrasonic bark deterrents are safe, effective solutions to stop your dog's annoying barking.