Why do we get goosebumps when we hear some high pitched and piercing sounds?

We often encounter similar situations in our lives, when we hear a certain voice, we will feel the hairs stand upside down, and the feeling of hairiness in our hearts. For example, when the teacher is writing on the blackboard, he accidentally scratches his fingernails across the blackboard, or the sound of a certain friction is very sharp, which will give us such a terrible feeling, and even goosebumps. Is this sound really so scary, and does it hurt our hearing?

There seem to be a lot of problems, let's go through them one by one. The frequency of this sound is relatively high, usually sharp, and at a moderate volume, it does not cause much damage to our ears, and it is not as scary as we think. In this way, why does it make people feel fearful, and make our bodies feel numb and afraid?

This brings us to the relationship between the mind and the body, where our sensory nerves are not determined by the body itself, but rather by the emotions that are higher than the body at the control level.

This concept doesn't sound easy to understand, let's take an obvious "chestnut", when we are angry, our strength will increase, and the secretion of certain hormones will also increase, so that the body will behave accordingly. And when faced with such a sound, the principle is similar. In order to live in the world, people will establish a variety of cognitive relationships since childhood, and when we hear the sound of firecrackers, we will think that firecrackers are being set off outside.

Our brains are amazing in that they record many languages and sounds to keep us alive in human society. When we hear a high-pitched sound, like an alarm to our ears, we can quickly notice the sound, and then the sound is fed back to the cerebral cortex to direct our body to make a nervous response. This has something to do with the sounds we use in our daily lives, for example, most of the alarm sounds are loud and loud, and it is this type of sound that makes us feel uncomfortable.

To talk about why such sounds have become the reason for human fear, we have to start with the evolution of organisms in ancient times, when humans were not able to fight birds and beasts. Beasts of prey have a low, roaring sound, while birds have long, high-pitched calls with sharp claws that prey on humans. That's why humans invented throwing spears and the like to deal with these birds.

So whether it is physiologically or psychologically, this sound just stimulates the sense of self-protection of human beings, suggesting that there may be danger around human beings, so that the human body will have goosebumps, but generally speaking, it is completely harmless to the human body.

Why do some people get goosebumps when they hear the sound of sharp objects scraping glass?

Because this is a normal physiological response, people can't stand this noise and get goosebumps.

Because after hearing these shrill voices. The brain produces a substance that is very resistant. That's why you get goosebumps on your body.

It can be said that it is an instinctive reaction, and everyone gets goosebumps when they hear such a voice.

Because these sounds can make people feel nervous and at the same time produce some unpleasant feelings.

The rate is relatively high, and the sound is usually sharper.

For example, when the teacher was writing on the blackboard with chalk at school, he suddenly scratched the blackboard with his nails too hard.

Not far from the street, a man on an electric bike pinched his brakes, and the brake pads of the electric car he were riding were very old.

And the kind like wiping the glass with foam.

At the same time, I deliberately checked it on the Internet.

Why do you feel goosebumps when you hear this kind of sharp sound:

When humans still live in groups, they shout at each other at high speeds to warn of danger, and this instinct still exists until now, and the human body reacts to this and secretes adrenaline. On the whole, it is an instinctive reaction of people.

Hopefully, your questions will be answered.

Finally, thanks for inviting this issue.

For the cherry sedan chair, some people will be very uncomfortable and get goosebumps when they hear the sound of sharp weapons scraping the glass?