What causes deafness? Detailed answer

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What causes deafness? Detailed answer

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What causes deafness?

We should never make fun of deaf or hard of hearing people. After all, they endure one of the most terrible sufferings that can only fall to the lot of a person. It is hard to imagine how much beauty and wonder passes by them.

Deaf and hard of hearing are not the same thing. The first refers to the complete or almost complete absence of hearing. It happens that people are born with this defect, but it can also be the result of an accident or illness. The second is gradually, during life, the lost ability to hear well.

Deafness cannot be prevented due to the birth defects inherent in this disease. But what leads to hearing loss can be avoided. Most often, these are various infectious diseases that affect part of the hearing aid in childhood, such as colds, tonsillitis, measles, scarlet fever, mumps, meningitis.

Less common is another cause of hearing loss - the growth of bones in the ear, which interferes with the propagation of sound waves.

Sometimes the cause is the sound itself! Loud explosions, strong vibrations, the noise of industrial machines. This is the third main factor that adversely affects our health.

What happens in such cases? Strong sound waves affect our hearing aid in such a way that it no longer perceives higher tones. After the age of fifty, changes can affect the auditory nerve, leading to partial hearing loss.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Why does a camel need a hump?

The camel is called the "king of the desert", and for good reason. The camel is just as ideally suited for life and travel in the desert as a ship is for sailing the seas and oceans.

The camel feels quite well where other animals would have died of hunger and thirst long ago. He carries his food and drink with him! For four days before the start of the next journey, the camel does nothing but eat and drink. He eats so much that a thick, weighing up to 45 kg hump rises on the back of the animal, which is the camel's fat "pantry" and is used by him during the journey. In addition, small cavities are located along the walls of the camel's abdomen, shaped like flasks. This is where the water supply is stored.

Thanks to this, the camel can withstand many days of transition from one source of water to another, and can go without food even longer, feeding on fat reserves from its hump. Towards the end of a long journey, the camel's hump loses its shape and dangles flabby, toppling to one side. After the transition, the camel needs a long rest to recuperate.

By the way, did you know that the camel is one of the very first animals that man forced himself to serve? The Egyptians used camels as early as 3000 years ago.

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