Highway noise barrier walls absorb sound energy before it reaches the receiver. The amount of acoustic energy absorbed by the sound barrier depends on parameters such as the range of sound frequency, material density, the angle of the wall, and the stiffness used to construct the wall. Transmission loss in sound barrier wall refers to the ability of the material to transmit sound energy. Transmission loss increases with the increase in the weight of material barrier surface.
Conversely, insertion loss in noise barrier walls helps in measuring the effectiveness of sound barrier. Insertion loss is the difference between the sound before the placement of the wall and after the construction of the wall next to the highway. Use of concrete masonry to construct highway noise barrier walls is economical. Concrete masonry is simpler to build and doesn’t require regular maintenance. It absorbs noise from industrial applications and vehicle traffic rather than reflecting it into other areas.
Highway noise barrier walls protect occupants of the large cities from potential noise-related dangers. The primary sources of noise across urban areas are vehicle traffic and industrial applications. High speeding also generates noise in urban areas. Use of transmission loss and acceptable noise diffraction has helped reduce the level of noise in urban areas. Federal aid highway program has proposed several noise abatement strategies. They include construction of noise barrier walls, placement of sound reduction equipment, and enhanced traffic management.
Benefits of Noise Barrier Walls
Concrete masonry is the commonly used material for construction of highway noise barrier walls. It has many desirable properties and characteristics such as durability, flexibility, and excellent structural capacity. The cost of development and maintenance of concrete masonry is also low. Concrete masonry has an exceptional aesthetic characteristic. It is available in different surface textures, shapes, and colors. It is tough to find a construction material with similar features to concrete masonry. Over time, noise barrier walls have become an essential component of highways in urban areas. As a result, concrete masonry is instrumental in improving the aesthetic appearance of the road.
Besides all beneficial characteristics mentioned above, concrete masonry has a vast ability to absorb sounds. Compared with other materials, sound barrier concrete masonry is much more efficient in decreasing noises along the highway. The reduction of noise from vehicle traffic and industrial applications is increasingly vital to urban communities. It is crucial for developing communities to create an atmosphere where people can live alongside the sources of noise.
The construction of noise barriers along the highway is a growing requirement. Noise absorbing barrier walls meet noise control needs by absorbing noise rather than reflecting it into other areas. With increased industrialization, noise reduction has become vital to all communities. Highway noise barrier walls use noise absorption material to reduce offensive noise levels significantly. Concrete masonry used to construct highway noise barrier walls can be changed, modified, and added if necessary. That helps minimize long-term maintenance costs and comply with industrial and community regulations.