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Dust hazard and protection of quartz stone table cutting

Dust hazard and protection of quartz stone table cutting

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From the harm side, the main dust will pass through the respiratory tract into the body, and the other is the noise.
Effects of noise on the cardiovascular systemUnder the action of noise, the heart rate can be accelerated or slowed down, and the changes of ST or T wave in the electrocardiogram can be seen in the absence of blood type. Early signs of blood pressure may be unstable, and prolonged exposure to loud noise can cause blood pressure to rise. The cerebral blood flow showed a decrease in amplitude and an increase in the inflow time, suggesting an increase in blood pressure and a decrease in elasticity.
Effects of noise on the nervous systemThe auditory organs affected by noise, into the brain through the nerve afferents in the process, the brainstem network structure occurs when the generalization, projecting to the cerebral cortex related parts, and the role of the hypothalamus vegetative nervous system, causing a series of neural responses. There may be headache, dizziness, palpitations, sleep disturbances and general debility, such as neurasthenic syndrome, memory loss and emotional instability (such as irritability, etc.). The objective examination showed changes in brain waves, characterized by decreased alpha rhythm and increased slow wave components. In addition, there may be an increase in latency during visual motion, a decrease in flicker fusion frequency, a decrease in visual acuity and stability, and so on. Dysfunction of autonomic nerve central nervous system is mainly manifested by skin scratch test and slow response.
But these two aspects, if you do good protection, should also be good, on the other hand, the body itself will pass through saliva and other parts of the dust.Influence of noise on human body1. Auditory system(1) temporary threshold shift temporary threshold shift is caused by the change of threshold of a person or an animal after exposure to noise from noise after hearing after a period of time can be restored to its original level.(2) the permanent threshold shift the permanent threshold shift is caused by noise or other means to restore to the normal level of the factors can not be increased hearing threshold.

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