Soft ears are often used to describe people who are not determined and easy to be soft-hearted. In fact, this statement is well-founded.
People with hard ears are generally stubborn and don't listen to other people's opinions. On the contrary, people with soft ears finally made a decision. The mild psychological state of interpersonal communication can narrow the distance between people, which is the most destructive social media artifact for people with soft ears, but it is also a fatal flaw.
It takes some methods to make friends with soft-hearted people. Because of gentle and unwavering individuality, it is likely to be used by people with ulterior motives and do bad things without knowing it.
Internal structure of ear
External ear: The external ear includes auricle and external auditory canal. The function of auricle and external auditory canal is to collect sound waves. The eardrum is an oval membrane, shaped like a hat, with the top inward and its periphery fixed on the bone to separate the outer ear from the middle ear. The eardrum can resonate with the mechanical fluctuation of sound waves and stop when it stops, so it can faithfully transmit sound wave stimulation to the middle ear.
Middle ear: The middle ear includes tympanic membrane, tympanic cavity and eustachian tube. The eustachian tube is the passage between the middle ear and the nasopharynx, and the pressure between the middle ear and the outside air can be balanced through the eustachian tube.
There are ossicles and ligaments in the tympanum. There are three ossicles, which form a joint with each other and are located between the tympanic membrane and the vestibular window. The contact with tympanic membrane is called malleus, the connection with vestibular window of inner ear is called stapes, and the connection between the two bones is called incus. When the sound wave reaches the eardrum, a series of movements of the three ossicles make the stapedial base swing back and forth on the vestibular window and transmit mechanical waves to the inner ear.
Inner ear: The inner ear is composed of a series of complicated lumens, also called labyrinth, which is located in the temporal bone and can be divided into bony labyrinth and membranous labyrinth. Labyrinth is a bony tube, and membranous labyrinthine is a membranous tube and sac contained in labyrinthine, which is composed of epithelium and connective tissue and basically conforms to the shape of labyrinthine. The membranous labyrinth is closed, and there are endolymph in the tube.
The space between membranous labyrinth and bony labyrinth contains external lymph. The internal and external lymph nodes are not connected with each other. Inner ear labyrinth can be divided into cochlea and vestibular organ. Cochlea is related to hearing, and vestibular organs are related to position (sense of balance).
Cochlea: The cochlea is shaped like a snail's shell, which is a spiral bone tube around the bone axis and rotates around the cochlear axis.
Normal human ears can hear mechanical waves in the range of 1.7cm~ 17m, that is, 20Hz ~ 20000hz, and the most sensitive band is 100hz ~ 400hz, that is, 0.86 m ~ 3.4 m The wavelengths of sounds in the band range are different, and nerve cells in different areas of the cochlea are sensitive to different wavelengths.
A bone plate extends from the cochlear canal of the axial bone, and its outer edge is connected with the basement membrane, and there is an oblique vestibular membrane above the basement. Therefore, the cochlea is divided into three cavities, the vestibular step above and the tympanic step below. The cavities are filled with external lymph, and the cochlear duct in the middle is filled with internal lymph. The vestibular step is connected with the oval window membrane, the tympanic step is connected with the cochlear window membrane, and the vestibular step is connected with the tympanic step at the top of the cochlea.
Cochlear canal is blind. There are auditory receptors on the basement membrane, which are called Corti organ and spiral organ. Huang Fengying's organ is mainly composed of supporting cells and ciliated auditory cells (or hair cells), which are covered by a covering membrane. Hair cells are sensitive to the wavelength of mechanical waves. The peripheral fibers of the auditory nerve wrap around hair cells in a network.
The vestibule is a slightly oval cavity located in the middle of the bony labyrinth, which contains the oval sac and balloon of the membranous labyrinth. There are five small holes in the back of vestibule communicating with three semicircular canals, and a large hole in the front communicating with cochlea. Elliptic sac, balloon and three semicircular canals are collectively called vestibular organs. They are all membranous ducts, filled with endolymph and connected with each other.
Elliptical sac and balloon are relatively enlarged parts of membranous duct, among which there is sac, which is a position receptor with sensory hair cells on it. The shapes of the three semicircular canals are roughly similar. Each semicircular canal accounts for about two-thirds of the circumference, each semicircular canal has a relatively enlarged ampulla, and there is an ampulla ridge in the ampulla, which is also a sensory receptor and also contains sensory hair cells.
Hair cells: Hair cells are columnar cells, and each cell has 100-200 unique cilia. These cilia are mechanical wave sensors for hearing. A little rest on the longest cilia is a plastic film, which captures mechanical waves and allows current to enter hair cells.
Hair cells, like photoreceptors of eyes, show not the performance characteristics of action potentials of other neurons, but their hierarchical responses. These graded reactions are not limited by the "all-or-nothing" characteristic of action potential.
The above contents refer to Baidu Encyclopedia-Ears.