How the energy of sound waves allows our brain to perceive the presence of various sounds There are three small bones of hearing inside our middle ear cavity, and when the sound is conducted to the last small bone, this bone has a stirrup on top like the one we ride our horses on, so it is also called the stirrup bone. The bottom side of this stirrup is connected to our inner ear. Well, a new name has come out, the inner ear. If there is a problem with the inner ear that causes hearing loss, the doctor will say, you have sensorineural deafness. Oh, the inner ear looks like the snail we see. Imagine taking the flesh out of a snail, laying it flat and straightening it, and there are three tubes of equal length side by side. These three tubes are filled with fluid. One of the tubes is connected at one end to the bottom surface of the stapes as mentioned above, giving it a nice name – the vestibular window; one end is covered by a membrane, which we call the round window. In the middle of these two tubes is a tube, which we call the cochlear tube, and the sound conversion structure grows in it! The sound is first pushed in by the vestibular window, and it keeps passing inside, and when it reaches the end of the tube, it is transferred to another tube through a small hole, and it keeps passing to the end of this tube, the round window. Imagine two parallel tubes in the flow of liquid but in the opposite direction, will certainly cause the liquid in the middle of the tube to produce oscillation ah. Inside this tube floats a thin membrane; the top of the membrane is covered with hair cells. The hairs on the top of the cells swing forward, while there is a cover film above the hairs will swing in the opposite direction because of inertia. In this way, the weak bio-current signal generated between the cap membrane and the hairs because of the displacement is transmitted to the brain through the auditory nerve, and then through the brain’s analysis and processing, we will have knowledge and memory of sound. I say this is a tube of an elongated and flattened illusion, that the fleshy head of the snail is very thick and the end is very thin. Then the thick place is responsible for feeling the high frequency sound, and the thin location feels the very thick and muddy sound. Damage to different parts of the body will cause a loss of sound at the corresponding frequency. The causes of damage in different parts of the body are also varied and different; the causes are different and the treatment will be different. Therefore, the correct diagnosis is very important.