Dogs weren’t always waiting by the door for snack time. Long ago, their hearing played a crucial role in survival. Dogs are ...

5 Strange Sounds Your Dog Can Detect That You Can't. ... the dog immediately began to relax and returned to a normal state. This shows how impactful ultrasonic pest deterrents can be to dogs.

Understanding Ultrasonic Bark Deterrents. Ultrasonic training devices capitalize on a band of sound frequency available to dogs but inaudible to us.

When your dog barks, just press the battery-powered control device and a 25,000-Hz signal will sound. Most ultrasonic deterrents start at frequencies around 25,000 Hz so that only dogs can hear them.

Dog repellent frequency. The ultrasonic dog repellant uses a standard 555 timer IC1 set up as an oscillator using a single RC network to give a 40 kHz square wave with equal mark/space ratio. This ...

According to crime intelligence research done by Dr Rudolph Zinn, small dogs kept inside the house is the biggest deterrent as the dogs will react to suspicious sounds and alert the residents.

MIAMI BEACH, Fla. – Dogs are man's best friend, but they can also be a crime deterrent. Studies profiling criminals and a Department of Justice report have found dogs can scare away even the ...

Dogs are also reported to detect sounds almost four times as far away as humans can. So what a human can hear at 20 feet, a dog can hear at roughly 80 feet, points out Marc Bekoff in the book ...

Understanding Ultrasonic Bark Deterrents. Ultrasonic training devices capitalize on a band of sound frequency available to dogs but inaudible to us.