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Hostel for students :: Talks, lectures
Industrial noise and its impact on human
Noise - sounds complex, causes discomfort or painful reaction. Noise - a form of physical pollution life. He is as a slow killer, as well as chemical poisoning.
The noise level of 20-30 decibels (dB) is almost harmless to humans. It is a natural background noise, without which human life is impossible. For loud sounds permissible limit is about 80 dB. 130 dB sound causes a person has pain sensation, and 130 - becoming unbearable for him.
In some industries the negative impact on health and long-term impacts and very intense noise (80-100 dB). Industrial noise tiring, annoying, interferes with concentration, negatively affects not only the organ of hearing, but also on vision, attention, memory.
Noise sufficient efficacy and duration can lead to a decrease in hearing sensitivity can develop hearing loss and deafness.
Under the influence of strong noise, especially high-frequency, in the organ of hearing gradually irreversible changes.
At high levels of noise reduction in hearing sensitivity occurs after 1-2 years of work at the average levels found it much later, after 5-10 years.
The sequence in which there is a loss of hearing, is now well understood. First, intense noise causes temporary loss of hearing. Under normal conditions, a day or two hearing restored.
But if the noise exposure continues for months or, as is the case in the industry, over the years, the recovery does not occur, and the temporary threshold shift is converted to DC.
First, nerve damage affects the perception of high-frequency range of sound vibrations, gradually spreading to the lowest frequency. Nerve cells in the inner ear are damaged so that the atrophy and die, not restored.
Noise has a detrimental effect on the central nervous system, causing fatigue and exhaustion cortical cells.
Insomnia occurs, develops fatigue, reduced performance and productivity.
Noise has a detrimental effect on the visual and vestibular analyzers, which can lead to disruption of motor coordination and balance the body.
Studies have shown that inaudible sounds and also dangerous. Ultrasound, which occupies a prominent place in the range of industrial noise that adversely affects the body, and although his ear does not perceive.
The harmful effects of noise during operation in noisy factories can be avoided by various means and methods. Significant reduction of industrial noise is achieved by using special hardware shumogasheniya.
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