In order to achieve the effect of low frequency noise reduction, usually the thickness of noise reduction facilities is relatively large, which increases the cost, how to make the economy and vibration and noise reduction in residential life balance, this paper proposes a thickness of 4mm two-dimensional phonon crystal thin plate, phonon crystal part of the material is organic glass, the rest of the structure material is transparent silicone rubber, in the premise of ensuring the light transmission, using Comsol for vibration band gap and transmission loss simulation, the results show that in the range of 500Hz to achieve a broadband vibration and noise reduction.
The rapid development of road traffic generates extreme noise pollution. The current development trend from noise control by simply reducing the noise level to overall soundscape design has brought revolutionary progress in the field of road traffic sound environment. This paper reviews the current situation of road traffic soundscape research. First, it systematically analyzes the development trend and hot keywords of road traffic soundscape and its related literature with the bibliometric method. It compares the development history of the road traffic soundscape from many aspects, such as concept, research framework and model, research method. It summarizes the research hotspots of road traffic sound landscape. Secondly, from the road traffic soundscape negative design (eliminating the existing bad soundscape as the basis) and positive design (creating a harmonious sound environment), the application and research on road traffic sound landscape are reviewed. A relatively complete set of road traffic sound landscape design methods is explored to create a good audio-visual context along the road, enhance and improve people's audio-visual comfort, and meet people's audio-visual feelings and health. Finally, the current situation and challenges of existing research are systematically summarized, and the future development direction and research trends of road traffic sound landscape are analyzed from standardized research system innovation, effective combination of research and practice, and exploration of quantitative design methods.
With the concept of environmental protection continuously enjoying popular support, more and more concerns have been drawn to the problems that how to reduce the damage of expressway construction to the ecological environment, how to protect the natural environment concerning the long-term interests of human development, and how to give full play to the role of natural environment in promoting economic and social development. This paper conducts comprehensive and systematic analysis on the impact of expressway construction on the environment along the route would, in a way, to improve people’s understanding of expressway construction and environmental protection. While in another way, it can increase the predictability in feasibility study and route plan design of expressway construction projects, with which targeted environmental protection measures can be adopted to ensure the harmony between expressway construction and economic development, social progress, and the conservation of the ecological environment.
Highway construction occupies a pivotal role in the development of the national economy, and the construction of many new lines and the transformation of existing lines will bring about a series of environmental issues. According to national development requirements, while ensuring economic development, environmental protection must be done well, the road construction must start from the design and selection of the route, and the environmental protection and the road construction must be combined. Rough construction should not be the focus but should be combined with the actual situation of the line construction to achieve harmonious development with the environment; the requirements for highway construction have also been raised to the point that highway construction must be coordinated with the environment, and economic and environmental benefits must be considered.
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