Cat ear hearing acuity
If you have a cat as a pet, you’ve surely seen as a statue and stop or move the ears to listen to sounds that are impossible to hear for you, how hard you try to hear what your cat is listening. Cats are nocturnal predators, and as such, they need to survive a sharp ear to enable them to identify exactly where their prey.
This superiority of the human ear in front of the cat is based on the characteristics of your hearing. While a human has 30,000 fibers cochlear nerve in the auditory nerve, the cat has more than 40,000, allowing you to hear sounds much weaker than we can hear us.
Furthermore, the ear is ready to capture 20k to 25k frequency, ie, ultrasound can not hear us ever because our auditory system is not ready for it. This ability to hear ultrasound is not free, but necessary because many of the animals that are their prey, communicate with such sounds.
But not only the sharpness of your ear allowing you to hear so clearly. The conical shape allows your ears pick up sounds and the ability to rotate 180 degrees by more than 30 muscles that make up each ear allows them to focus directly on their ears toward the source of the ear and, thus, be able to hear clearly all the nuances and variations in the sound.
Curiously, white-haired cats have undergone a genetic mutation that affects your ear. If the cat has one blue eye and one other color, can not hear with the ear of the same side as the blue eye.