This is why dogs and cats can hear sounds that are inaudible to us.

Many animals, such as dogs and cats, have a much higher sense of hearing than humans, which means they can detect sounds that are outside of our audible range.

Dogs, for example, have ears that are more sensitive to high-frequency sounds than human ears. They can hear sounds up to 65,000 Hz, while humans can only hear sounds up to 20,000 Hz. This means that dogs can hear high-pitched sounds that are completely inaudible to humans, such as the ultrasonic whine of a dog whistle or the high-pitched squeak of a mouse.

Cats also have highly sensitive ears, and can hear even higher frequencies than dogs. They can hear sounds up to 80,000 Hz, which means they are highly attuned to the sounds of small rodents and birds. Cats are also able to swivel their ears independently, which helps them pinpoint the exact location of a sound.

It's important to note that while dogs and cats have a higher sense of hearing than humans, their hearing is not infallible. Loud noises and frequent exposure to noise can damage their sensitive ears, leading to hearing loss over time.