As an example, many people can tap on the window to get their dogs to stop barking. The tap is a weak auditory novel stimulus. If their dogs are just bored and lonely, it is usually enough to get the dogs' attention and stop the barking. Some people use cattle prod technology anti-bark shock collars which give the dog a very painful shock. Pain is a very powerful stimulus and will stop almost all barking.
Most problem barking however is caused by something minor like loneliness or boredom.
Human psychological studies have proven that short, high pitched pure tones are the most annoying and alerting sounds, and dogs react the same as humans to audible novel stimuli. Unless the barking is caused by something severe, such as the sight of potential trespassers or fire, normal, well adjusted dogs alert to the UKS System tone and stop their barking before it can go on long enough to wake or disturb you or your neighbors. If you tap the UKS System microphone, you can actually see your dogs alert to the tone by pricking their ears and looking for the tone. The Kennel Silencers are proudly made in the USA by Micro Technology Services, Inc. in Richardson Texas.