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.

The high-pitched sound is uncommon to your dog, and should stop the nuisance barking immediately. It comes with an instruction ebook plus membership of support group, and the manufacturer claims ...

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.

But how did they evolve to hear better than humans?Well, let’s start with a little lesson in comparative anatomy. Humans can hear sounds ranging between 20 Hz and 20,000 Hz (20 kHz). That’s not bad if ...