Last time I reported on interviews between journalists and experts on the status of Shure music too loud may affect, even permanent hearing loss. But not merely by listening to loud music will hurt your ears, around you also had several risks, only that we are not aware of them.
Noise-Induced Hearing Loss is also called NIHL is one of the common factors that we encounter every day. Often this noise is not too big and always kept at an “acceptable” should be no or little influence is so great that our hearing. But when reached too large, noise will likely directly affect auditory temporarily (tinnitus) or even permanently (weakening listening function). Exposure to noise is too big, too long, or both at the same time this situation will hurt the sensitive biological structures of the inner ear, causing hearing loss
Most visible in the listener hearing loss is the ability to hear in one ear will deteriorate or both ears, requiring the speaker to repeat many times in the dialogue or, more simply, to listen to the media radio with high volume. In noisy environments, people with hearing loss a difficult dialogue, as well as get to know the ambient sound, affecting the normal activities of life.
There are a few people interested in that instead of treating them or find ways to “living with floods” totally NIHL can be prevented with careful attention to daily exposure to noise.
The subjects affected by NIHL
Almost all audiences of all ages can be affected by NIHL. About 15% of Americans aged 20 to 69 (about 26 million people) have a hearing loss due to business needs or everyday entertainment. So why is from?
NIHL can occur from the big noise of the engine hums as heavy, explosion or by contact regularly and for long periods with high volume sound. People who regularly drive is also very common disease, but almost no one is interested in it (usually the car has improved engine and emits very loud noise). People who listen to music with headphones with high volume routines open (even maximum) are also affected by the risk of NIHL very high. Playing music in the band, go listen to live without the use of hearing protection devices as well as one of the common causes.
Sound unit is the decibel (dB) and hearing safe levels for a long time to hear the sound is worth less than 75dB. Prolonged exposure to sounds above 85dB will affect the hearing and at a higher decibel, NIHL occurs more quickly.
The distance and time of exposure to noise is the main factor affecting decisions of NIHL faster or slower. Simple rules to prevent NIHL is not exposed to noise is too big, too close and too long.
The daily sound familiar that we often have contact with the dB as follows:
· Russian refrigerator motor: 45 dB
· Conversation normal: 60 dB
· German vehicles at crowded: 85 dB
· German motorcycle: 95 dB
· Music player with maximum volume: 105 dB (sometimes I do not understand what to do volume max tree ….)
· Whistle Brand: 120 dB (a few trucks or buses I saw recently also add powerful trumpet, walk along the road, it’s best to be shy, do not go near them)
· German artillery and gunfire: 150 dB
Noise affects how hearing
Sounds are the electrical signals originating from the change of sound waves travel through the air to the ear. The auditory nerve in the ear transmits these signals to the brain through complex biological processes.
Sound waves transmitted to the outer ear and ear canal will come into contact with the eardrum. Reception eardrum vibrations and sound waves will transmit these vibrations to three tiny bones in the middle ear is Malleus, incus, and stapes. The bones transmit vibrations to the cochlea are fluid-filled ears. An elastic band called membrane stretching from end to end cochlea to separate it into two parts above and below.
The vibrations will create ripple ear brought to the basement membrane waveform. The hair cells have receptors on the membrane function of the exposed bottom of the waveform. This receptor cells move up and down, on top of them are the contact points (called stereocilia) will turn to touch the surface of biological structures above and bent. When bent, the pores on the stereocilia opens early and exposed to the compounds necessary, generate electrical signals.
Nerves relay will transmit this electrical signal to the brain, make sounds we can hear and understand.
NIHL affects hearing will paralyze or kill tumor cells to this thread. In birds or amphibians, hair cells will grow back after a certain period of time, also in humans, it is not: D (errors in evolution: D)
The recognition marks NIHL
When exposed to loud noise for a long time, our hearing will be seriously affected. It is more dangerous phenomenon occurs slowly, so many subjective and often heartless, until the hearing is affected too seriously no time anymore. In addition to advanced age, aging normal cells and less activity, plus NIHL will severely affect the function hearing, many cases have to use hearing aids to be able to serve daily activities.
The noises and big explosions likely to hurt the bones of the inner ear sound transmission or eardrum. This is a very dangerous and will affect permanent hearing.
The noise is too large will make the ears normally be buzzing. This will decrease buzzing dies within 16 to 48 hours when the ear was restored, but it may persist or reappear later, permanently or create a buzzing small (close hiss ), which suggests that the ear was permanently damaged partially.
How NIHL prevention
NIHL prevention is quite simple if you have a little knowledge about the hearing and said attention nor subjectively about the ambient noise. Here is the note that you can easily remember and perform.
· Know the kind of sound should avoid contact (above 85 dB)
· Wear hearing protection devices (such as earplug) when exposed to noise and noisy activities
· Please do not turn to the player max
· Go to the nightclub to dance, you just insert into the ear cotton or foam mattresses