What is the name of the actress of Huanfu chewing gum, what is the name of this actress

The human ear is divided into three parts: the outer, the middle, and the inner ear. The outer and middle ears are separated by a membrane of less than 1 10 mm between them, which is called the eardrum, and it is the auditory nerve of the inner ear that can really feel the sound. When sound waves are transmitted, the eardrum is the first to be vibrate, and then the vibrations are transmitted from the eardrum to the middle ear and finally to the inner ear.

When the aircraft takes off or lands, the gas in the cabin can move downward or upward relative to the aircraft due to the action of inertia due to the vertical acceleration. When the plane takes off, the gas in the cabin can descend relative to the aircraft, and at this time, the pressure at the bottom of the cabin will increase, and the pressure in the upper part of the cabin will decrease. Similarly, when the plane lands, the pressure at the top of the cabin will increase, but the pressure at the bottom of the cabin will decrease.

During the acceleration of take-off and landing, the surface of the eardrum is affected by external air pressure, but this pressure is constantly changing. If the mouth is tightly closed, then a closed system is formed between the closed throat and glottis to the mouth and tympanic membrane, and the pressure cannot change rapidly with the external air pressure. At takeoff, the pressure on the outside is stronger than the pressure on the inside, and the eardrum must be concave inward; Conversely, when landing, the external pressure is less than the internal pressure, and the tympanic membrane must bulge outward.

In this way, as soon as you go in and out, your ears will feel bulging. But when the tension on the eardrum is much greater than the maximum amount the eardrum can withstand, the eardrum can rupture. In addition, today's supersonic aircraft, which burst through tight air when flying close to the ground, can produce very large sonic vibrations, and it is also very likely to burst the eardrum.

It is worth mentioning that there is a tube in the middle ear that leads directly to the throat, which is medically known as the "eustachian tube". The Eustachian tube is usually closed, but when we open our mouth, especially when we swallow, the Eustachian tube can open and close on its own. In addition, when the sound from the outside is very loud, the mouth is opened quickly, and the sound waves will reach the tympanic membrane from the outer ear and the eustachian tube in two different directions at the same time, so that the pressure inside and outside the tympanic membrane cancel each other, so that the tympanic membrane cannot be broken.

Chewing gum is a swallowing action, so it prevents the pressure on the inside and outside of the eardrum from being different. In addition, opening the mouth can also avoid rupturing the eardrum. In the same way, when being bombarded on the battlefield, those experienced soldiers will also use the method of opening their mouths to avoid the huge damage to the eardrum caused by the strong local pressure change caused by the huge energy sound wave generated by **.

This man's name is Amarna Miller

Born in Madrid, Spain in 1990, 163 cm tall and debuted in 2010, your picture is from a short film released in February this year in the Black Man series, answering that I hope it will help you.

Yang Peng's high manuscript chain Xiaoying read the letter.

played the heroine of the movie "Adolescence" [Zhao Yihuan].