Outside the window is a passing train. Such a room requires the most comprehensive treatment of noise.
People who live on the side of the subway can enjoy the fast traffic, but at the same time, their ears are often disturbed by the rail traffic; the houses are bought in the traffic arteries, and the car noises on the roads outside the house are always lethargic; the buildings are built beside the bus stations and often can I heard the harsh sounds of the start-up and parking of the big public; the footsteps, laughter, and music sounds of neighbors upstairs and downstairs are often irritating... How can these noise effects be minimized?
>>> Links: 27 Laws for Environmental Home Improvement
Indoor noise is over 46 decibels, and people feel unwell
In general, high- and medium-frequency noise is dominated by social noise and some construction noise, such as lawn mowers, tweeters, etc., and the peak concentration is on the 10th floor. The low-frequency noise is mainly traffic noise, such as the start and brake moments of buses. The noise produced is mainly below 6 layers.
Indoors, the noise does not exceed 30 decibels, and the human body feels comfortable. If the indoor noise reaches more than 46 decibels, it will seriously affect people's lives, work, and study. However, everyone's sensitivity to noise is different. With age and physical conditions, the tolerance to noise changes. Perhaps the same house did not feel the danger of noise, and when the work pressure becomes large and the nerves are sensitive, or when the environmental changes such as outdoor traffic and construction sites bring about more noise, the home space becomes an intolerable space. According to medical experts, long-term low-frequency noise can easily cause neurasthenia, insomnia, headaches and other neurosis, and even affect the fetus in the abdomen of pregnant women.
National regulations can not exceed 40 decibel noise <br> From October this year, the Ministry of Environmental Protection has announced the implementation of the new "social environment noise emission standards." Yan Xiang, director of the Building Physics Laboratory at Tsinghua University and Dr. Yan Xiang of Building Acoustics, stated that in this standard, it is clearly stipulated that residential bedrooms, hotel rooms, hospital wards, and other rooms that mainly require restful sleep and that need to be kept quiet should be kept at night (22:00 to Day 6:00) Noise must not exceed 30 decibels, and daytime (6:00 to 22:00) must not exceed 40 decibels.
Yan Xiang said that when consumers purchase real estate, they can use this standard to judge whether the noise in the room they are living in is too high. Consumers who have already felt noise interference can perform appropriate noise management according to standards.
Noise reduction method
Analyzing Noise Sources Considering Noise Environment According to Jia Menghu, an expert in noise management, the types of noise are various, and there are many sources of noise in cities. Jia Menghu said that there are four main sources of indoor noise: First, traffic noise. Second, urban construction noise. Third, social life and noise in public places. Fourth, household appliances directly cause indoor noise pollution.
Jia Menghu said that in recent years, the sound insulation capacity of new commercial buildings has not reached the current national standards, and traffic noise, living noise, elevator noise, construction equipment noise, etc. have penetrated into the house from windows and walls, and they Formed a long-term hazard. In addition to the noise outside the room, it may also come from neighbors, elevators, equipment, etc. Professionals often carefully examine the source of noise, according to the owner's sensitive situation, develop noise control programs.
Change the window to remind the inspection report <br> Yan Xiang believes that, in addition to improving the sound insulation standard during construction, residents who have already lived in the leakage state should seek professional noise management. Sound insulation windows are more effective methods. one. According to Jia Menghu, if noise pollution reaches 70 decibels, a sound-proof window with a sound-proof capacity of 40 decibels can achieve a comfortable standard of 30 decibels indoors.
Jia Menghu prompts consumers to pay attention to checking whether the test report is true and effective when purchasing soundproof windows. At present, there are test reports on soundproof windows issued by four units of the Tsinghua University Building Environment Testing Center, the China Academy of Building Technology, the Beijing Institute of Labor Protection, and the Beijing Door and Window Inspection Center.
Comprehensive governance also requires multiple ways of noise removal
The solution to noise pollution should be a systematic project. Sound insulation windows are just a part. However, sound-proof windows are not isolated links, but they also require architectural acoustics and multi-faceted house walls.
If the building's wall thickness is less than the national standard of 250 mm, relying solely on acoustic windows will not solve the problem. In addition, sound-absorbing materials can be used for pipe sound transmission, and professional sound insulation methods such as paving sound-absorbing panels can also be used for wall-to-wall and floor-floor sound transmission.
â– Market survey
Selling "insulating windows" do not know how to soundproofing <br> When the reporter visited a building material distribution center in Nancheng, he discovered that there were many products on the market called "soundproof windows", but the seller's noise-insulating effect on soundproof windows was divergent. Whether it is a building material city or an individual business, many sellers have advertised that their windows can be soundproofed. Some merchants directly indicated that they could make sound insulation at 40 decibels. Others indicated that their windows had selected "hollow glass" or "vacuum glass". Achieve good results. When reporters asked whether soundproof windows had related standards for sound insulation, many sellers began to be vague, indicating that as long as one additional layer of their own windows were installed, the problem of noise pollution could be completely solved.
In the interview, the reporter learned that, in addition to the different opinions on sound insulation, the unannounced visits to the soundproof window sellers almost certainly did not promise to reduce the indoor noise to a certain level. Most shopping guides said that only the indoor noise pollution could be significantly improved. I do not know about the relevant principles and standards. Regarding the doubts about the installation process, most merchants stated that if consumers buy the soundproof windows, they will only measure the size of the windows of the consumer's homes, instead of measuring the noise environment and indoor noise environment of the owner's community, and after installing the soundproof windows Can not provide indoor noise reduction measurements.
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