Productive noise

All sounds generated during the production process can be referred to as productive noise or industrial noise. Based on their source, they can be divided into 3 categories: the first is aerodynamic noise generated by air movement, such as the noise produced by ventilators, blowers, air compressors, and jet planes ； The second type is mechanical noise generated by mechanical impacts, friction, and rotation, such as the noise produced by textile machines, various machine tools, and crushing machines ； Third is the electromagnetic noise generated by electromagnetic forces, such as the noise produced by generators, transformers, etc. Noise can cause hearing loss and occupational deafness. It also has adverse effects on the nervous system and cardiovascular system, among others. The degree of harm that noise causes to the human body depends on its frequency, intensity, and duration. 　　　　　　　

When productive noise reaches a certain intensity, it becomes a harmful factor, and its impact on the human body is most evident in damage to the auditory organs and hearing. Occupational hearing loss, also known as occupational deafness or occupational hearing impairment, is one of the legally recognized occupational diseases. Furthermore, occupational noise can also cause certain damage to the nervous system, cardiovascular system, reproductive system, and digestive system of those exposed to it. The occurrence and severity of the hazards caused by occupational noise are primarily determined by factors such as noise intensity, the duration of exposure to noise, the frequency and spectral characteristics of the noise, and the sensitivity of those exposed to it. Therefore, to prevent these hazards, actions must be taken in relation to these factors, with the main measures being as follows: 1. Modify the noise source to reduce noise levels. The fundamental solution is to transform sound-producing objects into ones that do not produce sound or produce only a faint sound through technological innovation. 2. Take measures to reduce noise intensity by addressing the noise propagation pathways. Specifically, this can be further divided into: placing high-noise machines and low-noise machines separately ； Use silencers or sound-absorbing, sound-dampening, and sound-insulating materials to block the sound source. 3. Strengthen personal protection. The most common methods are wearing earplugs, earmuffs, or soundproof hats. 4. Conduct regular health check-ups to identify those who are sensitive to noise or have early signs of hearing loss, and take appropriate measures.

The main physical and psychological harms caused by noise are as follows: 1. Damage to hearing. Studies show that when a person listens to motorcycle noises continuously for 8 hours, their hearing is damaged; in a rock concert hall, hearing is impaired after just half an hour ； Living in a noisy environment with noise levels above 80 decibels can result in a 50% chance of developing deafness. 2. Noise damages eyesight. It is well known that noise can severely affect the auditory organs and even lead to loss of hearing. However, there is a subtle internal \"connection\" between the ears and the eyes; when noise affects the auditory organs, it can also \"affect\" the visual organs through the nervous system, thereby reducing a person’s vision. Research indicates that noise can cause abnormalities in color vision and color visual field. The investigation found that among the 80 workers exposed to steady-state noise, as high as 80% suffered from a reduction in their visual field in the red, green, and white colors, which represented an 85% increase compared to the control group. The impact of noise on vision is common in daily life; for example, when shopping in a quiet and well-lit store, one feels pleasant and calm, which allows for careful selection of items and purchasing everything needed. Shopping while loud fast-paced pop music (some so-called pop music that is nothing more than deafening noise) plays from speakers often leads to frustration, dizziness, and even confusion – one may fail to buy what needs to be bought, or be dissatisfied with purchases due to poor identification. The main reason for this is the impact of dryness on vision. 3. It is harmful to the human cardiovascular system. Studies on urban noise and residents’ health in our country show that for every additional decibel of noise in a region, the incidence of hypertension increases by 3%. 4. It affects the nervous system, making people impatient and irritable. Scientific research has found that noise can stimulate the nervous system, leading to its suppression. People who work in noisy environments for extended periods may also develop neurasthenia symptoms such as headaches, dizziness, tinnitus, memory decline, and reduced vision. 5. It affects sleep and causes fatigue. The harm of noise to sleep: Sudden noise at 40 decibels can wake up 10% of people, while at 60 decibels, it can wake up 70% of people. Psychologically, noise first causes psychological symptoms such as poor sleep, difficulty concentrating, and reduced memory. It then leads to irritability, emotional instability, and a decreased tolerance for stress, as well as an easily irritable temper. Ultimately, it can result in a range of diseases such as high blood pressure, ulcers, and diabetes. In psychology, this condition is referred to as a psychosomatic disorder, meaning a physical illness caused by psychological factors. Dr. Li also explained that noise can lead to a high incidence of psychosomatic diseases, and that such diseases are difficult to treat; they require a long recovery period, causing significant inconvenience in people’s daily lives and work. The direct harmful effects of noise on the human body include damaging the nerves, causing blood vessels to spasm, and accelerating the metabolism of hair cells, thereby speeding up the onset of aging. In clinical diagnosis: The patient’s external manifestations include a general bad mood, restlessness, and speaking in a loud voice ； The most common conditions are tinnitus, ear pain, hearing loss, dizziness, headaches, and noise-induced deafness ； For infants and young children who are in the stage of growth and development, the hazards of noise are particularly evident. Babies who are constantly in noisy environments not only suffer hearing damage but also experience delays in intellectual development. Since noise causes sensorineural damage and hair cell damage, it is difficult to repair such damage. Experts believe that noise poses significant harm to the human body; the impact of noise levels in decibels on the body is as follows: for example, 0–50 decibels: comfortable, whispering level ； 50-90 decibels: disrupts sleep, causes sadness and anxiety ； 90-130 decibels: Itching and pain in the ears ； Above 130 decibels: eardrum rupture, deafness.

Noise is defined as anything above 70 decibels. In factory production, some sources of noise can be avoided; for example, in reaction vessels, the problem is often caused by improper equipment design, while in centrifuges it is due to incorrect operation or loose screws. These issues can all be prevented. As for those machines that produce excessive noise due to their inherent characteristics, it is necessary to wear appropriate personal protective equipment to reduce the associated hazards

Source: http://www.myjsy.com/jsyserver/front/JSYseenews.aspx?id=207 Noise refers to sounds that annoy people; all sounds generated during the production process are known as industrial noise. Such as the noises produced by various machines in production facilities, such as machine tools, textile machines, crushers, steel rolling mills, etc.; the sounds emitted by fans, air compressors, whistles, etc., as well as the humming noise from generators, transformers, and so on. 　　 The effects of noise on the human body: The impacts of noise on the human body are multifaceted and affect the entire body. They mainly manifest as follows: 1. Auditory system: Short-term exposure to high levels of noise can cause subjective symptoms such as tinnitus and hearing loss; long-term exposure to such noise can lead to permanent hearing damage. 2. Nervous system: Prolonged exposure to high levels of noise can lead to headaches, dizziness, tinnitus, palpitations, and sleep disorders. 3. Cardiovascular system: Increased heart rate, unstable blood pressure; long-term effects often manifest as elevated values. 4. Digestive system: Noise may affect the function of the digestive system, leading to gastrointestinal disorders, reduced digestive capacity, loss of appetite, and weight loss. 　 　Noise prevention: 1. Control noise sources: There should be a certain distance between workshops that generate noise and those that do not; noise sources that have no direct relation to the production process, such as electric motors, should be placed outside; devices that produce no sound or only low levels of noise should be used in place of those that generate high noise levels, such as shuttleless looms instead of shuttle looms; regular equipment maintenance should be carried out to reduce unnecessary noise. 2. Adopt sound insulation and sound absorption measures: For sources of high noise, isolation screens and enclosures should be used; in construction projects, sound-absorbing materials should be applied appropriately to control the spread of noise. 3. Strengthen personal protection: Workers exposed to high levels of noise should wear earplugs or earmuffs to reduce the impact of noise on them. 4. Conduct pre-employment health checks; those with occupational contraindications such as disorders of the auditory organs or problems in the central nervous system should not engage in work in noisy environments. Regular hearing tests and other health examinations should be carried out on workers, and measures should be taken promptly if any issues are detected, such as transferring them to another role.