1) interferes with sleep, affecting the quality and quantity of sleep, causing frequent breathing, rapid pulse and nervous excitement. And fatigue and fatigue will appear the next day, which will affect work efficiency and cause insomnia, tinnitus, dreaminess, fatigue and memory loss for a long time. In the case of high noise, the incidence of this disease can reach 50-60%;
2) Hearing damage, noise below 85 decibels will not cause hearing damage, and noise above 85 decibels may cause hearing damage, but this damage is only temporary, as long as it is not living in such high noise conditions for a long time, it can still be recovered;
3) Physiological effects on human body. Noise can cause nervous reaction of human body, stimulate the secretion of adrenal gland, cause the change of heart rate and the increase of blood pressure. Noise can reduce the secretion of saliva, gastric juice and gastric acid, and is prone to gastric ulcer and duodenal ulcer;
4) Influence on children and fetus: Children's mental development is slow in noisy environment. Studies have shown that children's intellectual development in noisy environment is 20% lower than that in quiet environment. Noise will also have a nervous reaction to the mother, causing uterine blood vessels to contract, thus affecting the supply of nutrients and oxygen necessary for fetal development.
How can we reduce noise? The following five "points" are effective ways to make a room quiet.
1. Rough wall: If the wall is too smooth, it is easy to produce echoes indoors, thus increasing the volume of noise. Therefore, you can choose decorative materials with good sound absorption effect such as wallpaper, and you can also use decorative materials such as cultural stones to make the wall rough, which can reduce noise. In addition, the wall and ceiling can choose sound insulation materials, such as mineral wool sound-absorbing board.
2. Various uses of fabrics: It is also a common and effective method to eliminate noise by using fabrics. The test shows that the sound absorption effect of suspended and flat fabrics is the same, such as curtains and carpets, and the sound insulation effect of curtains is the most obvious. In addition, the soft touch of the carpet can not only produce a comfortable and warm feeling, but also eliminate footsteps, which is beneficial to people's rest. In the bedroom, in order to ensure a quiet rest environment, thick curtain cloth should be used to control light and external noise.
3. Choose soft spots on the floor: the fiber of wooden furniture is porous and can absorb noise, so it can be properly considered when purchasing furniture, and using cork floor in decoration is also an effective choice.
4. The wall is thicker: the street side should be soundproof. The window facing the street is converted into a "soundproof window", such as a double-layer window, which can effectively soundproof, and insulating glass is selected, which has a good soundproof effect. In addition, when decorating, you can add a layer of paper gypsum board to the wall facing the street, fill the gap between the wall and gypsum board with sound-absorbing cotton, and then paste wallpaper or paint the wall on the gypsum board.
5. Soft light: dazzling floors, ceilings and walls will interfere with the central nervous system of the human body, making people upset and particularly sensitive to noise. Therefore, in interior decoration, when choosing various lamps and decorative materials, we should pay special attention to soft light.