Solutions to isolate traffic noise on roads and cities

Roads unite people. Every day it is estimated that millions of vehicles circulate on the roads.

At Metalesa, our goal is to ensure the safety of people. For this reason, we take care of guaranteeing safety while driving with our containment systems such as bridge parapets, terminals or crush cushions. However, on the roads there is another danger that is not seen, but heard. And not for vehicle occupants, but for the people who live around road infrastructures: noise pollution.

Noise pollution is a problem that we face every day both on roads and in urban environments. Its effects are harmful to people and the environment, therefore, society is increasingly becoming aware of it and taking action through specific action plans governed by the authorities.

Acoustic studies on roads

Precisely, one of these measures is the performance of acoustic studies. The pollution of a specific area can be measured with noise maps. If an excess of noise is concluded as a result of such study, the next step is to configure the optimum solution to attenuate it, normally with an acoustic screen.

Undoubtedly, acoustic screens are the best corrective measure to reduce the propagation of noise generated by road or rail traffic, since they act as a barrier between the receiver and the noise source, both absorbing and reflecting the noise waves. Thus, acoustic screens are the most widely used anti-noise systems in transport infrastructures, due to their rapid installation, their value for money and their effectiveness.

Our acoustic screens

At Metalesa, through the installation of our acoustic screens, we ensure the quality of life of people who struggle day to day traffic noise.

Our acoustic screens are conformed of sound-absorbing panels that provide quality acoustic and mechanical solutions. No only they minimize noise pollution from traffic on roads and railways, but also from many other sources such as industrial facilities (factories,...), commercial malls (air conditioning equipment), or massive events in public/private facilities (sport stadiums, leisure clubs, hotels…). All of our acoustic screens comply with European standards EN14388, EN16272 and EN16727.

Learn more about the Regulation of noise reduction devices for roads.

How to decide among different type of acoustic screens?

There are multiple drivers to analyse when choosing the right acoustic screen for a certain project.

  • On the one hand, the requirements defined by the acoustic study should guide the project.
  • It is essential to take into account the environmental and climatological agents to which the panels will be exposed. Mainly the wind loads that dictate the mechanical loads that the panel must support. Our experts in calculation of structures have extensive experience in designing the optimal solution for each case. But also other aspects such as the type of environment, which derives in different levels of corrosivity, and before which, the appropriate finishes must be applied. Or even climate or exposure to snow which may recommend different materials.
  • Finally, aesthetics is another part of the decision. Goals such as integration with a forest or a green landscape, or even keeping nice views of an attractive panorama, are issues to take into account and that can make one solution more convenient than another.

All these aspects must be taken into account together so that the technicians in charge of carrying out the project select the panel that best suits the needs of each acoustic screen work. We have several panel configurations for each scenario, all of them accredited by tests carried out in accredited laboratories: metallic steel or aluminum, methacrylate, wood or vegetable mesh. Having said that, the most commonly installed screens for road and railway infrastructures are steel ones. We have numerous models that solve any casuistry. You can see all our acoustic screens at this link.

But in this article, we focus on less common, but equally interesting speaker configurations:

Metawood noise barrier with wooden panels

This sound-absorbing panel is made up of wood modules of varying dimensions, which fit between the HEA/HEB fastening profiles of the support structure.

The wooden acoustic panel consists of the following elements:

  • Traffic side: In this part, pine wood boards are arranged with the possibility of making different combinations with boards horizontally, vertically and obliquely, achieving various aesthetic effects.
  • Sound insulation: It is a semi-rigid rock wool panel with a black veil that protects it from erosion and humidity.
  • Rear side: They are planed pine wood boards arranged horizontally.
  • Thanks to the Metawood panel, maximum noise insulation and absorption is obtained. In addition, thanks to their natural materials they allow an excellent landscape integration.

Metagreen noise barrier with vegetal panels

Rock wool and other materials are placed inside the vegetable acoustic panels, along with a green plastic mesh that facilitates the growth of vegetation. Rock wool is capable of retaining rainwater inside, becoming a highly valuable moisture reserve both for animals and to facilitate the growth of vegetation. Metagreen panels are made of recyclable and sustainable materials.

The Metagreen acoustic screen guarantees an excellent acoustic and absorbent effect, in addition, it has a long durability when undergoing a galvanized anti-corrosion treatment.

MP Acoustic Panel Range

Long useful life

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Mixed steel and methacrylate noise barrier

The mixed steel and methacrylate acoustic screen, like the previous two, also has exceptional sound-absorbing qualities. We put at your disposal all kinds of varied designs.

In addition, its aesthetics provide excellent landscape integration.

We show you the mixed acoustic screen of steel and methacrylate that we installed in the work of the N-1 in Lasarte (Guipúzcoa).

If you need more information about our acoustic screens, or want to know our complete range, contact us. We will be happy to help you.

International Noise Awareness Day

Today is International Noise Awareness Day, a day to contribute in making our society understand the importance of reducing noise for our health and the environment.

Noise is usually defined as «Inarticulate sound, generally unpleasant». Today we live with noise everywhere due to the noise pollution produced, among others, by vehicles. The noise pollution to which we are exposed in our day to day life can cause serious consequences such as hearing loss, sleep disorders or cardiovascular diseases. Cities are taking more and more measures against these annoying sound, however, there is much work ahead, and other facilities such as airports, sports stadiums or auditoriums also need solutions to isolate noise

To reduce noise in urban spaces, we have a wide range of products that will combine with each space according to its style. Acoustic screens are an efficient and aesthetic solution that can be used in any of the cases.

Metagreen acoustic screens

These screens are our most sustainable acoustic screens and not only they perform their job against noise, but they also contribute to sustainability thanks to their built-in vegetation and the use of recyclable materials in their manufacture. Vertical Garden Concept.

These are screens made up of an interior of rock wool as the main material to absorb external noise and an exterior of micro-perforated plastic mesh thanks to which vertical vegetation will grow.

These screens offer an ecological and natural appearance, perfect to be installed in urbanizations and private areas where they will give the appearance of a vertical garden. Its galvanized treatment offers a long durability of these screens that insulate and absorb noise magnificently.

Methacrylate acoustic screens

Acoustic methacrylate acoustic screens are ideal for not losing light and ensure a visual sensation of spaciousness. It is an insulating panel that consists of a polymethacrylate sheet in a structure made up of synthetic rubber gaskets.

The methacrylate panel configuration achieves maximum insulation. It integrates with the landscape thanks to its transparency and/or colors. These screens can be combined in the personalized model with other materials, achieving a product that completely adapts to the aesthetics of your city.

Metawood acoustic screens

Wood also offers a touch of nature like Metagreen screens, but they can also be combined between wood vertically and horizontally to achieve different aesthetic effects.

Metawood screens have rock wool to isolate sound as well as a black protective veil that protects the panels from erosion and moisture.

Wood acoustic screens provide excellent insulation and maximum absorption. Its wooden aesthetic integrates perfectly with the landscape and the treatments they require are respectful of the environment.

Concrete acoustic screens

It is made up of a double layer of reinforced concrete structure and sound-absorbing porous concrete. These concrete acoustic panels can be the color of the concrete or painted smooth or with decoration.

It has good acoustic absorption. Isolates sound excellently. It is a very durable structure with low environmental impact, recyclable and without waste.

Customized acoustic screens

We can also create personalized noise barriers by combining different panel models, being able to design acoustic screens completely to the client's taste and adapted to the needs of each space.

It must be taken into account that the product that really performs the absorbent function is the rock wool housed inside, so the exterior can be designed to fit aesthetically with the space without affecting its properties.

These solutions that we describe for urban areas are applicable to isolate traffic noise on highways, where the installation of steel or aluminum acoustic screens is more common.

Steel or aluminum acoustic screens

Both the steel and aluminum acoustic screens are made up of a noise-absorbing layer, an inner layer of rock wool that isolates this noise, and the reflective layer so that the remaining noise does not pass through, but bounces back. Finally, to guarantee this acoustic performance, these panels are closed with polypropylene side covers.

They are a fantastic option for their insulation and absorption capabilities. In addition, they integrate with the environment thanks to their various designs and available combinations. Being a modular structure they are light and easy to install. They are also resistant to wind loads and rail traffic overpressure, a performance accredited in laboratory tests.

Acoustic screens can be temporary or fixed and the installation varies according to type. Among all the solutions that we offer in Metalesa, a previous acoustic study will always be assessed to guarantee the best solution against noise that adapts to the needs of the space. You can compare our screens in the product comparator or contact us, we will be happy to help you.

MP Acoustic Panel Range

Long useful life

Know more!