frequency (vibration per second) bats can't her?

Question

I need to find a frequency (vibrations per second) that could not be heard by a bat.

Answer 1

Frequency is how fast an object vibrates and sound vibrates in waves. The vibrations are measured in Hertz. So one Hertz (1 Hz) is equivalent to one vibration in a second. Humans can hear from 20 Hz to 20 kHz. Anything higher is called ultrasound or ultrasonic sound. The reason that bats use ultrasound is because it has such a high frequency and it has a low diffraction or it bends less. They use this sound to do a couple of things like to catch their prey and also just to get around. The method of doing such tasks is called echolocation. They make a sound and wait for it to bounce back to hear it. If they hear it come faster in a particular area than the rest of the sounds then they know that something is near. The frequencies of bats are different in many books found. In one source like the encyclopedia it says that the frequency is 120 kHz. While in another it says 100 kHz. The truth is it ranges because when the bat makes a sound it isn't of the same frequency all the time.

So, then the values the frequency ranges from are stated to be as low as 10 kHz to as high as 120 kHz.

Answer 2

Don't fall for the old myths. Bats are a lot of things, but blind is not one of them. When it was first discovered that a carnivorous species of bat used echolocation and could navigate in total darkness, people assumed it meant they didn't rely on vision at all, but in fact they do have quite good eyesight. It is true that most carnivorous bats use echolocation to find their prey and get information of their surroundings, but they do, and especially the herbivorous fruit bats, use their sight to find food and obstacles in the area. Fruit bats, to some extent, also have color vision. In other words, they really see the world similarly to humans. Only the colors they see are significantly different.