but sometimes listening to their toys’ squeaking sounds for hours on end can make us feel like we’re going crazy. If only there was a squeaker toy that only your dog could hear — well ...

Dogs are very good at hearing. They can hear sounds from 4 times further away than human ears can. They can also hear ultrasound, which is sound so high-pitched that humans can’t hear it.

The frequencies that people hear are measured in Hertz (Hz). Dogs can hear 40-45 Hz to 45,000 Hz, whereas a human can hear only 20 Hz to 20,000 Hz. So, dogs can hear a wider spectrum of sounds, ...