In the previous page I talked about the ear structure and the audible range of "animals" I will take up the sound emitted by "animals" ! ～Menw～ Structure of animal's ear The animal's audible range Sound emitted from animals ～Ultrasound～ Sound emitted from animals ～Mosquito sound～ ↑ Click and you can fly to the content you want to see! ↑ ●○Sound emitted from animals ～Ultrasound～
Here is about ultrasound, one of the sounds emitted from animals!
The animals using ultrasonic waves are various. Among them, I would like to take up the bats and dolphins that came out this time.
Bats
Bats utilize ultrasound to avoid obstacles in dark caves。
Ultrasound is emitted from the throat, and ultrasonic waves reflected from obstacles are used to accurately grasp the position information！
This is called echo lotion (echo localization).
So, how does the bat specifically recognize the position of the object？
It is as follows.
Finally, of the sounds emitted from animals, it's about mosquito sounds!
Mosquito sound is an unpleasant sound emitted by mosquitoes.
" that sound "that pleasant sound is heard when there are mosquitoes near the summer 's day.
Like a B U Z Z
Especially when I hear it before going to bed I am annoyed and can not get to sleep at all.
But,Some people do not think so at all. Why is that?
Actually, there is also frequency involved there !
Mosquito sound (mosquito) is the sound from 17000 Hz to 2000 Hz when it is set to the frequency. The frequency of this mosquito sound is located on the higher side among people's frequencies. (* See above)
So, what will happen if you make it to the actual sound? Let's experience!
※ Pressing the play button will produce a sound. Volume・Listening attention.
♪16000Hz ♪17000Hz ♪18000Hz ♪19000Hz ♪20000Hz
How was it? Have you heard too much and do not feel bad ...?
But How you feel with age will change.
As people go years ahead, the width of the sounds heard will narrow down. In short, the mosquito sound, which is gradually high-frequency, can not be heard.
So, Even though we are unpleasant for young people, it is not felt uncomfortable for those who are middle- to high-rise people!
