What is the normal hearing of the ear
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The ear is a very important part of our body. All the sounds we hear are due to the ears. In life, many people do not pay attention to the care of their ears, which often leads to hearing loss. Under normal circumstances, once the hearing is reduced, it is basically irreversible. Therefore, we must pay attention to behaviors that may cause hearing loss, and develop good habits at the same time, so that we can effectively care for our ears. What is the normal hearing ability of the ear? Generally, the hearing air conduction of a normal person is around 0-20, and a normal person can hear sounds in a frequency range of 2 to 20,000 Hz within a fairly large range of intensity variations. Among them, the loudest tolerable sound is about 1012 times the smallest perceptible sound. The way to express the range of intensities is a logarithmic scale called decibels (dB). When 0dB is the hearing threshold, the sound of a normal conversation at a distance of about 0.9 meters is 65dB, while the sound of hitting a steel plate with a hammer is as high as 115dB. What are the behaviors that are harmful to hearing? 1. Frequent ear cleaning leads to hearing damage: In fact, many people have this habit, thinking that frequently cleaning their ears can make people feel comfortable. In fact, if you clean your ears too frequently, it may really cause damage to the ear canal, leading to otitis, tympanic membrane perforation, etc. Because our ears are very fragile, when people use sharp tools to clean their ears, they may damage their ears if they do not control the strength properly. In fact, in most cases, our earwax can fall off by itself. As long as it does not affect your hearing, you should not remove it frequently. If you feel that there is too much earwax and your hearing has decreased, go to the hospital for a detailed examination and treatment. 2. The volume of the headphones is too loud: Our eardrums are very fragile. If you use headphones for a long time and the volume is very high, the sound pressure will be directly transmitted to the eardrum. The eardrum is very thin and very close to the earphones. If it is stimulated by sound pressure for a long time, it is very likely to cause hearing loss or damage. 3. Let the baby drink milk while lying down: Each of us has a tissue structure in our ear called the Eustachian tube, which is the channel connecting the middle ear cavity and the throat. The Eustachian tube of a baby is different from that of an adult. It is relatively straight. If a baby drinks milk while lying down, he or she may easily choke and cough. At this time, the milk will enter the middle ear canal through the Eustachian tube, causing otitis media.4. Abuse of antibiotics: Antibiotics are prescription drugs and need to be taken under the guidance of a professional doctor. Many people believe that if they are sick, they can get better by taking antibiotics. In fact, children's resistance is much weaker than that of adults. The dose that adults can use may not be suitable for children, which may eventually lead to ear damage, deafness and other phenomena in children. |
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