The ear is divided into three parts: the outer ear, the middle ear, and the inner ear. The external sound into the human ear, through the external auditory canal to the tympanic membrane, causing the tympanic membrane and the mechanical vibration of the auditory ossicles chain, stapes foot plate vibration through the vestibular window and into the inner ear lymph. This pathway is called air conduction. Sound waves into the outer lymph of the inner ear into liquid wave vibration, the latter caused the vibration of the basement membrane, located in the basement membrane of the spiral apparatus hair cells static cilia bending, causing the hair cell electrical activity, the hair cell releases neurotransmitters agonizing spiral ganglion cells axon endings, resulting in axonal action potential. Nerve impulses along the brainstem auditory conduction pathway to the brain temporal lobe auditory cortex center and produce hearing.
There is another way for sound to enter the human ear, and that is through bone conduction: sound is transmitted through the skull to the inner ear, causing corresponding fluctuations in the inner ear lymphatic fluid, which in turn causes the basilar membrane to vibrate and produce hearing.
A problem in either of these two pathways can lead to hearing loss. There are a number of factors in life that can lead to hearing loss:
1. Excessive ear cleaning or trauma that damages the eardrum.
2. The result of diseases of the five senses, such as otitis media, rhinitis and so on.
3. Cardiovascular diseases, such as hypertension.
4. Work stress, such as fatigue, rest and so on.
A problem in either of the two conduction pathways can lead to hearing loss. There are many factors in life that may lead to hearing loss:
1. Excessive cleaning of the ear or trauma that destroys the eardrum.
2. The result of diseases of the five senses, such as otitis media, rhinitis and so on.
3. Cardiovascular diseases, such as hypertension.
4. Work stress, such as fatigue, rest and so on.
Hearing impairment brings a lot of trouble to people's life, study and work. Hearing impaired people can't hear well or mishear words, which leads to learning difficulties, communication difficulties, poor work or brings embarrassment and trouble, so that hearing impaired people are gradually isolated from the society.
Hearing impairment will also bring discrimination in life or employment, resulting in a sense of psychological inferiority, stress, depression, withdrawal, unwillingness to communicate with others, the formation of personality isolation, moody, irritable, short-tempered.
Hearing loss affects the development of the central nervous system, leading to atrophy of the auditory nerve, dulling the sense of hearing and slowing the brain.
After hearing loss is detected, it is important to seek medical attention in order to restore hearing through medical treatment. Some people need to choose hearing aids and other hearing devices to improve their hearing and improve their lives in order to prevent further hearing loss due to reasons such as missing out on the best time for treatment.