Long-term memory loss at work in disco

Too loud is noise, and the physical and psychological harm caused by noise mainly includes the following aspects: hearing loss. Some tests show that when people listen to the sound of motorcycles continuously, their hearing will be impaired after 8 hours; If you are in a rock concert hall, your hearing will be impaired after half an hour. Harmful to people's cardiovascular system, the survey of urban noise and residents' health in China shows that the incidence of hypertension increases by 3% for every decibel increase in regional noise. It affects people's nervous system and makes people impatient and irritable. Affect sleep and cause fatigue.

From the perspective of psychoacoustics, noise, also known as noise, generally refers to inappropriate or uncomfortable auditory stimulation. It is a kind of compound sound which is composed of numerous frequencies and has aperiodic vibration. In short, noise is an aperiodic sound vibration. Its sonic waveform is irregular and it sounds harsh. From the social and psychological point of view, any sound that interferes with people's study, work and rest and makes people feel uncomfortable is called noise. Such as the sound of running water, knocking, rustling and the roar of machines, are all noises. It is measured in decibels. Zero decibel is the lowest intensity of audible sound.

noise can be divided into high intensity and low intensity. Low-intensity noise is not harmful to people's physical and mental health in general, and it is also beneficial to improve work efficiency in many cases. High-intensity noise mainly comes from industrial machines (such as looms, lathes, air compressors, pickaxes, blowers, etc.), modern vehicles (such as cars, trains, motorcycles, tractors, airplanes, etc.), loudspeakers, noise from construction sites, shopping malls, sports and entertainment venues, etc. These high-intensity noises do harm to people's bodies, make people feel tired, produce negative emotions and even cause diseases. High-intensity noise not only damages people's hearing, but also affects the nervous system, cardiovascular system, endocrine system, digestive system, vision and intelligence to varying degrees. If people work and live in a noise environment of 95 decibels for a long time, about 29% will lose their hearing; Even if the noise is only 85 decibels, 1% people will be deaf; Noise of 12~13 decibels can make people feel pain in their ears; Stronger noise will damage the hearing organs. In the nervous system, strong noise can cause symptoms such as headache, dizziness, burnout, insomnia, emotional anxiety, memory loss, increased slow waves in EEG, autonomic nervous system dysfunction, etc. In the cardiovascular system, strong noise will cause changes in pulse and heart rate, elevated blood pressure, arrhythmia, conduction obstruction and changes in peripheral blood flow. In the endocrine system, strong noise will cause hyperthyroidism, enhanced adrenal cortex function, increased basal metabolic rate, sexual dysfunction, menstrual disorders and so on; In terms of digestive system, strong noise will cause digestive dysfunction, gastric dysfunction, decreased gastric acid, loss of appetite and so on. In short, strong noise will lead to a series of physiological and pathological changes in the human body. 22 people who worked in an environment with noise up to 95 decibels were investigated. Among them, 39% were dizzy, 32% were insomnia, 27% were headache, 27% were stomachache, 27% were flustered, 27% were memory impaired, 22% were upset, 18% were poor appetite and 12% were hypertensive. Therefore, we can't take strong noise for granted, and we should take measures to prevent it. Of course, people are sensitive to noise, and there are great differences among individuals. Some people are sensitive to noise, and some people have strong adaptability to noise, which is also related to psychological factors such as people's needs and emotions. No matter how different people are, strong noise always needs to be prevented.

In order to prevent noise, Professor Ma Dayou, a famous Chinese vocalist, has summarized and studied the hazards and standards of various kinds of noise at home and abroad, and put forward three suggestions:

( 1) In order to protect people's hearing and health, the allowable value of noise is 75~9 dB.

( 2) ensure conversation and communication, and the allowable value of environmental noise is 45~6 decibels.

( 3) It is suggested that the sleep time should be 35~5 decibels.

Chinese psychologists believe that the control of noise environment should take into account not only human factors, but also economic and technical feasibility. Adequate noise control must consider the whole system composed of noise source, sound transmission way and sound receiver. Noise control measures can be aimed at the above three parts or any of them. The contents of noise control include:

( 1) To reduce the noise of sound source, industry and transportation industry can choose low-noise production equipment and improve production technology, or change the motion mode of noise source (such as reducing the vibration of solid sound generator by damping and vibration isolation).

( 2) reduce the noise in the sound transmission way, control the noise transmission, and change the noise transmission way that has been emitted by the sound source, such as adopting sound absorption, sound insulation, sound barrier, vibration isolation and other measures, and rationally planning the layout of cities and buildings.

( 3) When the sound source and transmission route cannot be taken, or the acoustic measures still cannot achieve the expected effect, it is necessary to take protective measures for the sound receiver or the sound receiver. For example, workers who have been exposed to occupational noise for a long time can wear ear protectors such as earplugs, earmuffs or helmets.

although noise control is technically mature now, due to the large scale of modern industry and transportation industry, there are many enterprises and places to adopt noise control. Therefore, we must make a comprehensive balance from the aspects of technology, economy and effect in preventing noise. Of course, specific problems should be analyzed in detail. In places where outdoor, design rooms, workshops or employees work for a long time, the intensity of noise should be low; The warehouse or few people go to the workshop or open place, and the noise is slightly higher. In short, there should be some differences in the treatment of noise at different times, places, properties and durations.

Long-term exposure of pregnant women to noise exceeding 5 decibels will lead to dysfunction of endocrine glands, mental stress and disorder of endocrine system. Seriously, it will increase blood pressure, fetal hypoxia and ischemia, lead to fetal malformation and even abortion. However, high decibel noise can damage < P > fetal hearing organs, which will affect some areas. It affects the development of the brain and leads to mental retardation in children.

The malignant stimulation of noise seriously affects our sleep quality, and will lead to neurasthenia symptoms such as dizziness, headache, insomnia, dreaminess, memory loss, inattention, and digestive tract symptoms such as nausea, nausea, stomachache, abdominal distension, and dull appetite. Nutritionists have found that noise can also increase the consumption of vitamins, trace elements such as amino acid, glutamic acid and lysine in human body, which affects health; Noise increases adrenal gland secretion, increases heart rate and blood pressure, which easily leads to heart attack; At the same time, noise can reduce the secretion of saliva and gastric juice and gastric acid, thus suffering from gastric ulcer and duodenal ulcer.

It is harmful to people's cardiovascular system. The survey on urban noise and residents' health in China shows that the incidence of hypertension increases by 3% for every decibel increase in regional noise.

it affects people's nervous system and makes them impatient and irritable.

affect sleep and cause fatigue.