The volume of square dance music is "directional" controlled in the designated area, and the decibels of surrounding noise are significantly reduced, and the sound of campus activities is concentrated and "covered" in the playground, which can not only ensure normal teaching, but also reduce the impact on the surrounding environment...... In the past two years, the Qingyang Ecological Environment Bureau has been committed to exploring ways to reduce noise, and has added new high-tech noise reduction equipment in some parks, squares and schools to "reduce noise".
New smart devices in the park: noise reduction and promotion
On the morning of April 17, on the small square on the east side of the People's Park, square dance enthusiasts were dancing to the music and pictures played by a lightbox advertising device, and the volume was moderate and not harsh. This is in contrast to the noise disturbance caused by multiple loudspeakers and music coming and going.
Such a change stems from the fact that the Qingyang Ecological Environment Bureau has "new" a set of smart square dance equipment here. The device looks like a vertical light box billboard from the outside, with a horizontal sound at the top and an electronic display at the bottom.
The staff of Qingyang Ecological Environment Bureau opened the side of the light box and introduced,This is the built-in music player,Music is played through an external USB flash drive and the volume is constant。 The staff held the noise monitor to align it with the sound test, and the noise decibel was exceeded, and then walked out a few meters away, and the data on the monitor dropped significantly.
Test the decibel level at close range
Test the decibel level at a distance
The staff explained: "This is the use of advanced ultrasonic directional propagation technology, so that the sound emitted by the equipment is concentrated in a fixed area of propagation, only people in the sound field can feel the strength of the sound, beyond the range, the sound is greatly attenuated to below the environmental decibels, which can 'control' the noise from the sound source, optimize the public sound environment." ”
"The USB flash drive for playing music is kept by the security personnel of the People's Park, and the public can borrow the USB flash drive to play music on the device after registering the information. The music in the USB flash drive is downloaded by the park management according to the preferences of square dance lovers, and it will be updated frequently to meet everyone's dancing needs. Now everyone consciously borrows and returns USB flash drives, and slowly develops the habit of using public equipment. The staff said that they hope that through the installation of smart devices, they can further guide everyone to consciously and civilly use music and dance.
In addition, the electronic screen at the lower end of the device will broadcast some civilized cities, ecological environmental protection, popular science information, etc. in real time, becoming a comprehensive smart sports service facility integrating cultural publicity, mass fitness guidance, popular science propaganda and other functions. At present, the equipment has been piloted in Chengdu People's Park and Tongrui Park, and will be added according to regional environmental needs in the next step.
Campus layout sound reduction system: let the playground "quiet".
A few days ago, Chengdu Huanhua Primary School is holding a sports meeting, and the playground is in full swing, but after passing through the school gate, it does not feel the "lively" inside, which is the result of the five "quiet playground systems" around the campus playground.
Five "quiet playground system" layout in the four corners of the playground of Huanhua Primary School and the center of the flag-raising platform, Qingyang Ecological Environment Bureau staff introduced, and Huanhua Primary School is separated by a wall of residential communities, the original playground broadcasting equipment for the traditional omnidirectional audio. In this regard, the Qingyang Ecological Environment Bureau collected the sound propagation direction according to the area of the playground and analyzed the data, and used directional sound technology to design the professional sound field of the playground to realize sound zoning control and directional propagation, so as to ensure the normal teaching of the school and solve the noise contradiction between teaching and residents' lives.
In addition, 10 such devices have also been installed in Chengdu Shimuro Chengfei Middle School, there are a number of communities near the middle school, after the noise reduction equipment is put into use, the sound is attenuated with the increase of the diffusion angle, which can make the sound concentrated in a specific area to spread, which not only meets the music guarantee of school sports meeting, radio gymnastics, and extracurricular activities, but also reduces the noise pollution of the surrounding environment.
The relevant person in charge of the Qingyang Ecological Environment Bureau said that it will further monitor the noise environment in residential areas, park squares, and campuses in and outside the district, innovate work measures, use more high-tech means, and do a solid job in noise pollution control, so as to provide the city with a replicable and promotable Qingyang experience of comprehensive treatment of noise pollution in social life.