More and more commercial housing, a lot of new residential areas are installed in the basement of the water pump room, the low-frequency noise complaints about the pump operation is also common.

There was a case in Beijing of a young couple who lived in a million-yuan mansion, the wife became pregnant and the child died shortly after birth. The couple pointed the finger at the two 24-hour pumps downstairs, which they blamed for the low-frequency noise.

Last year, Mr. Wu, who lives in hangzhou tiancheng jiayuan, also complained that he would find that the sound of the water pump was so clear at night that he would become agitated and find it difficult to calm down after listening for a long time.

The inflatable pumps and water tanks installed in the basement do not have good sound insulation, and the sound produced during operation goes directly to the ground. And the sewage pipe in the household is connected with the ground, this sound is directly along the pipe to the home. "The sound of the water pump motor running, the sound of the water running after the water control valve of the water tank is opened, is carried along the sewage pipe to the neighboring homes. Field test noise above 35 db, especially at night.

There are many ways to deal with this noise, the most fundamental of which is to remove the noise source directly. Mr Tsien's idea is to cut off the noise-by rerouting sewage pipes, not underground, but above ground, to a manhole.

Since the pipes are public, Mr Qian cannot change them without permission. He has a solution, but how to implement it is a problem.

Relevant solutions (Suggestions) :

"Mosquito wings" bring a lot of suffering

"It's been more than a year, and it gets really bad in the summer." At the mention of the "buzz" at home, miss zhu felt upset. Since moving into the neighborhood last year, she has noticed that a water pump at the dry cleaner on the ground floor, facing her balcony and master bedroom, works every day from 5 a.m. to 11 p.m.

As summer approached, the dry cleaner added a freezer, and the sound of "mosquito wings" became louder. "there was a pregnant woman living next door. She could not rest in the master bedroom because she was worried that the noise was bad for the fetus.

In order to eliminate this annoying noise, miss zhu has also repeatedly looked for community property, but the problem has been unable to get an effective solution. "We have also spoken to the dry cleaners many times to try to turn off the pumps before 9pm so as not to interfere with the normal schedule of residents." Zhang, the manager of dongxing property in the community, also found it difficult to deal with low-frequency noise, a seemingly absent but annoying "new type of noise".

Low-frequency noise frequently appears in residential buildings

Water pump, transformer, central air-conditioning main engine, refrigerator, elevator...... With the improvement of living standard, low-frequency noise sources frequently appear in residential buildings, especially the low-frequency noise emitted by the operation of pump house in high-rise buildings, which has a great impact on the daily life of residents. It is understood that low-frequency noise has a strong penetrating force to the building, and even soundproof Windows are sometimes difficult to resist. If people live in a low-frequency noise environment for a long time, they are prone to neurasthenia, insomnia, headache and other symptoms, especially older people are more susceptible.

Mr. Wang, an employee of the 12369 complaint hotline of the municipal environmental protection bureau, told the reporter that there were not many complaints about low-frequency noise, but the environmental protection department found it difficult to solve the problem when dealing with related complaints.

"The key is to control it at the source." Mr Wang said that the low-frequency noise sources in residential buildings need to be prevented from multiple sources, such as planning, design and construction, rather than relying solely on the supervision and control of the environmental protection authorities.

There is a vacuum in environmental regulation

"China's current environmental protection regulations set the standard for regional environmental noise, which only provides for the maximum value of high sound, but not for low frequency noise." Mr. Fu, a staff member of the municipal environmental protection bureau's policy and regulations department, told reporters that the key to controlling low-frequency noise is to have a specific noise pollution standard.

Then, in view of the potential low-frequency noise nuisance in the community, can the environmental protection department timely point out the problem in the project construction eia? Mr. Fu said that the eia work generally includes the initial evaluation and prediction after the project is approved and before the development and construction, and the evaluation and prediction when the project is completed and accepted.