How does noise induced hearing loss develop?

Noise-induced hearing loss, although **, is a progressive, permanent hearing loss. However, it is also completely preventable. Prolonged exposure to sound at a sound pressure level of 85 dB or higher can cause damage to the inner ear auditory hair cells, resulting in noise-induced hearing loss.

This kind of damage can be caused by sudden strong impulse noise such as ** sound and gunshot; It can also be caused by prolonged or repeated exposure to loud mechanical noises or recreational environments such as high decibels. Because it is difficult to hear soft, high-frequency sounds, people with noise-induced hearing loss can hear what is being said but cannot understand what is being said. The process is so silent that people don't usually realize they have hearing loss unless it's so severe that they can't have a day-to-day conversation.

If a person stays in a loud or pulsed sound environment (a brief but high-intensity sound) for too long, the sensory structure of the inner ear is damaged, which can lead to permanent hearing loss. At the same time, it may be accompanied by the occurrence of tinnitus symptoms, which may gradually disappear or persist for a long time, or may appear intermittently. Exposure to loud noises (more than 100 decibels) over a period of time strips the nerve cells of this myelin sheath.

This prevents them from successfully transmitting information from their ears to their brains, which is why hearing is impaired by the use of headphones. Exposure to loud noises (more than 100 decibels) over a period of time strips the nerve cells of this myelin sheath. This prevents them from successfully transmitting information from their ears to their brains, which is why hearing is impaired by the use of headphones.

Noise-induced hearing loss (NOLSE

hearing

loss) refers to hearing loss in people who are generally exposed to noise for a long time. The value after deducting the age-induced hearing loss is used as an indicator. Affected by factors such as noise intensity, frequency, exposure time, and exposure mode (continuous, intermittent, pulsed).

In terms of the relationship between noise intensity and hearing loss, the noise intensity exceeds the critical value (noise level 55 dB to 65 dB above), and the hearing loss is generally linearly related to the noise intensity after a certain period of exposure. The slope of the curve varies with the audiometry frequency.

In modern society, noise has brought more and more harm to people. In ordinary life, we are always surrounded by noise, whether it is traffic noise or engineering noise, which will cause great damage to our hearing. So, what are the factors related to noise damage to our hearing?

Let's take a look at it.

Factors related to noise damage to hearing:

1.The greater the noise intensity, the heavier and faster the damage to hearing. The intensity is the same, the higher the frequency, the narrower the spectrum, and the more harmful it is.

2.Impulse noise (duration less than seconds, interval greater than 1 second, intensity fluctuation amplitude of more than 40dB) is more harmful than sustained noise of the same sound level. The unsteady state (sound intensity fluctuation above 5db) noise in continuous noise is more harmful than that of steady-state noise.

3.Regardless of the type of noise, the more hours and years of service you are exposed to each day, the more you will suffer. The critical exposure period for hearing impairment (the minimum number of years that causes more than 5% of workers to have hearing impairment) is related to noise intensity:

About 20 years at 85db(a); About 10 years at 90dB(A); About 5 years at 95dB(A); Less than 5 years at 100dB(A). If the daily exposure time is the same, continuous exposure is more harmful than intermittent exposure with rest.

4.The combination of noise and vibration is greater than that of non-vibration.

5.The older the age, the more susceptible to damage, is also related to the individual's sensitivity. Sensitivity varies greatly.

6.The original patient has sensorineural hearing loss, which is susceptible to noise redamage. The impact of middle ear disorders on noise damage is inconclusive.

7.It has a lot to do with the ability to consistently use individual or group protective measures.

Noise-induced hearing loss requires medication, including vasodilators, adenine nucleoside triphosphates, vitamin B and other drugs, and should be removed from the noise environment. Depending on the degree of hearing loss, patients with advanced disease may choose to wear hearing aids, implant vibrating sound bridges, or cochlear implants.

1. General**.

In the early stage, vitamins and vasodilator drugs can be used at the same time as recuperation**, if the disease has been long, the spiral and spiral ganglion cells have been degenerated, it is difficult to work, and those who affect daily life can be equipped with hearing aids, implantation of vibrating sound bridges or cochlear implants.

2. Drugs**.

Noise-induced hearing loss can generally be treated with vasodilators, such as ginkgo biloba extract injection; drugs that improve microcirculation, such as dome chuandozine; energy mixture, adenine nucleoside triphosphate; Vitamin B1, B12 and other drugs are symptomatic**.

3. Surgery**.

Noise-induced hearing loss does not require surgery**.

People who stay in a noisy environment for a long time can cause tinnitus, dizziness, and hearing loss. Long-term work in a noisy environment can cause poor concentration, neurasthenia, affect sleep entry, and damage physical health.

People experience temporary thresholds, permanent thresholds, and acoustic impairment after passing through noise.

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