Why can't the ears hear the sound?
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Why can’t my ears hear sounds?
1. Cerumen Embolism: When we usually chew and talk, it will cause vibrations in the external auditory canal, and the cerumen will be expelled. However, in the elderly, due to increased secretion of cerumen glands in the cartilage, muscle relaxation, easy collapse of the external auditory canal, and easy hair growth in the ear canal, etc. Cerumen blockage causes hearing loss.
2. Ototoxic drugs: Ototoxic drugs include aminoglycosides, salicylates, anti-tumor drugs, etc., especially aminoglycosides. The toxicity of these drugs to the ear is irreversible. The pathogenic mechanism is: the inner ear hair cells actively take up drugs, and the drugs bind to the hair cell ribosomal RNA, causing mistranslation of the mRNA to generate toxic superoxide free radicals, leading to hair cell necrosis. In addition, due to varying degrees of sclerosis of the renal arteries in the elderly, the basement membranes of the glomeruli and renal tubules are thickened, and the effective renal blood flow is reduced, leading to a decline in renal function in the elderly, and the kidneys are the main or only source of many antibacterial drugs. excretion pathway. Renal function decreases and ototoxic drugs accumulate in the inner ear, first damaging the outer hair cells. Over time, the inner hair cells will also be damaged, worsening permanent hearing loss.
3. Diseases that affect the blood supply to the inner ear: Studies have shown that heart disease (and risk factors for heart disease, such as high blood pressure) can increase the risk of hearing loss, and damaged cardiovascular disease has a negative impact on the peripheral and central There are negative effects on the auditory system, especially in the elderly. Good blood circulation plays an important role in keeping hearing healthy, conversely, insufficient blood flow and damage to blood vessels in the inner ear can lead to hearing loss. This is because the fragile hair cells in the cochlea depend on good blood circulation. These hair cells convert the acoustic signals collected by the ear into electrical signals and send them to the auditory nerve. Poor blood circulation deprives these hair cells of sufficient oxygen, causing damage. Or damaged, and the hair cells cannot regenerate, which can lead to permanent hearing loss.
4. Bad lifestyle habits such as smoking and drinking: Alcohol and nicotine can directly damage the auditory nerve, and long-term excessive drinking can causeRisk factors for high blood pressure and heart disease that are common in the elderly.
5. Environmental factors can cause sudden deafness, such as strong sounds from disco bars and dance halls, low-frequency noise from electronic equipment, etc. Many people do not notice the effects of these sounds. Hazards: If people live in this environment frequently, people's hearing will be damaged to a certain extent. Modern young people are under a lot of mental and psychological pressure, and they may also suffer sudden deafness.
6. The sudden loss of sound due to excessive work pressure or other reasons makes many people very scared. This is It is a symptom of sudden tinnitus. Sudden tinnitus is caused by a bad lifestyle, such as excessive fatigue, staying up late and working overtime, playing online games, playing mahjong all night, etc., which leads to lack of sleep and tight blood vessels, resulting in insufficient blood supply to the inner ear.
Measures can be taken to prevent some lifestyle factors related to hearing loss, such as quitting smoking and drinking, and participating in some physical exercise to promote blood circulation throughout the body. The last word: early detection, early intervention.