How can you design an effective noise barrier?

1 Define your noise problem

Before you start designing a noise barrier, you need to understand the source, level, frequency, and direction of the noise you want to block. You can use noise measurement tools, such as sound level meters, to quantify the noise and identify its characteristics. You also need to consider the existing and future land use, topography, climate, and aesthetics of the site where you plan to install the noise barrier.

2 Choose your noise barrier type

There are different types of noise barriers that can suit different situations and preferences. The most common ones are solid walls, berms, or a combination of both. Solid walls are usually made of concrete, wood, metal, or plastic, and can be designed with various shapes, colors, and textures. Berms are mounds of earth or vegetation that can blend in with the natural landscape and provide other benefits, such as erosion control and wildlife habitat. However, they require more space and maintenance than solid walls.

3 Calculate your noise barrier height

The height of your noise barrier is one of the most important factors that determine its effectiveness. The higher the barrier, the more noise it can block. However, higher barriers also cost more and may have negative impacts on the visual quality and air circulation of the area. To calculate the optimal height of your noise barrier, you need to use a formula that takes into account the distance between the noise source and the receiver, the noise reduction goal, and the acoustic properties of the barrier.

4 Optimize your noise barrier design

Once you have decided on the type and height of your noise barrier, you can optimize its design by applying some additional features that can enhance its performance and appearance. For example, you can use absorptive materials, such as foam or rubber, to reduce the reflection of noise from the barrier surface. You can also use angled or curved sections to deflect or scatter the noise in different directions. Moreover, you can add decorative elements, such as murals, plants, or sculptures, to improve the aesthetic value and public acceptance of your noise barrier.

5 Evaluate your noise barrier impact

After you have designed your noise barrier, you need to evaluate its impact on the noise environment and the surrounding community. You can use noise modeling software, such as TNM or CadnaA, to simulate the noise levels before and after the installation of the barrier. You can also conduct field measurements and surveys to verify the actual noise reduction and the satisfaction of the residents and users of the area. You should also monitor and maintain your noise barrier regularly to ensure its durability and functionality.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?