Roads and Motorways

Sound walls are without doubt the most effective system for solving the problem of noise pollution in road and motorway areas.

TECNOACUSTICA, with its own qualified staff, has developed a wide range of sound walls so as to achieve durability and aesthetic quality while ensuring an economical production process.

TECNOACUSTICA, as well as manufacturing the product, can provide a range of services ranging from preliminary noise reduction design using suitable calculation software, to acoustic testing when the intervention is complete. 

 

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Metal Noise Barriers

Tecnoacustica produces modular metal panels for road and motorway sound walls using various materials. The TECNOWALL sound barriers, identified by the code TW, can be made of galvanized, painted steel, in this case AV is added to the identifying code, or painted aluminium, with the addition of ALV to the code, or Corten steel, identified by the letters AC. The panel thickness can vary from 8/10 mm to 15/10 mm, which is shows by the figures 8, 10, 12 or 15 next to the letters in the code that indicate the material. Depending on the sound insulation or sound absorption requirements, TECNOWALL metal panels are available in two different types, with a nominal thickness of 115 mm and 95 mm.

All our panels have the CE marking.

The panels are equipped with vibration-damping plastic heads designed to minimise the acoustic bridges at the uprights and allow the panel to be adapted to any type of vertical support.

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In some special cases, due to static requirements, when we need to have greater spaces than usual between supports or when high wind speeds are a factor, mixed panels using different materials can be used to create the panel. The mixed steel and aluminium panel that TECNOACUSTICA offers, labelled with the code TW 115AV10+ALV12, is from the TECNOWALL range with a nominal thickness of 115 mm composed of a shell of painted filled steel sheet metal (AV) with a thickness of 10/10 mm (10) and a perforated sheet of painted aluminium (ALV) with a thickness of 12/10 mm (12).

To integrate better with the environment and to improve the quality of the product, TECNOACUSTICA proposes the DECOR finishes (wood effect) and the ANTI-GRAFFITI treatment. The DECOR effect improves the aesthetic characteristics of the panel, while the ANTI-GRAFFITI treatment allows dirt and graffiti to be removed from the panel without damaging the underlying paint.

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Transparent Noise Barriers

From an architectural point of view there is often the need, mostly aesthetic, to create large transparent surfaces.
The transparent panels denominated TECNOWALL TRANSPARENT can be realized in acrylic material (Polymethylmethacrylate) identified with the letter A and with a 15 or 20 number that indicates the thickness of material:

  • 15 to the thickness 15 mm
  • 20 to the thickness 20 mm

Alternatively, the transparent panels TECNOWALL TRANSPARENT can be made of laminated safety glass, toughened and not,  identified with the letter V and with a number indicating the composition of the laminated sheets:

  • 88.2 shows a panel made up of two glasses with 8 mm thick with 0.76 mm PVB
  • 88.4 shows a panel made up of two glasses with 8 mm thick with 1.52 mm PVB

In both versions they are supplied with perimeter supporting frame in galvanized and painted sheet steel with polyester powder cycle  and EPDM  rubber seals. The frame can be provided also with a special bumper system that makes it suitable for large structural profiles complete with centering system on the span.

 

A very important aspect related to the use of transparent panels in noise barriers is the risk of birds colliding with them. To avoid bird strikes, which are often fatal, a study of the transparent surfaces was carried out by the LIPU (Italian League for the Protection of Birds) to which TECNOACUSTICA made significant contributions. This study showed that the most effective way to make the transparent reflective surfaces harmless is to include matte stripes in the transparent panel, preferably vertical, with a specific thickness and spacing. The mass use of coloured panels has little effect from this point of view and the insertion of silhouettes of birds of prey appears to be even less effective.

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Wooden Noise Barriers

The wooden barriers, as well as providing effective sound protection, are an architectural element of unquestionable value. By using indigenous European woods such as oak and resinous woods, treated with ecological mineral oils, noise barriers have a different environmental impact.

The structural elements that constitute them are made, in part, of solid wood. The ornamental elements are made with treated wooden boards. The sound absorbing material can be made from high density mineral wool panels or polyester fibre panels, and it is shielded from atmospheric agents by a protective net in polyethylene fabric, which has a high mechanical resistance.

To ensure perfect acoustic sealing at the joints between one panel and the other, neoprene seals are used that are resistant to ageing, weathering and UV rays.

The wooden anti-noise panel, even if made with high quality wood, requires a high level of maintenance over time. The cost of maintenance work that will be sustained over time must therefore be taken into consideration.

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Integrated Noise and Safety Barriers

The integrated noise and safety barriers are a result of the need to build noise barriers for roads where there is not enough space to be able create separate noise and safety barriers.

For this reason, integrated noise and safety barriers have been designed so that a single product can meet both needs. An integrated noise barrier must undergo a CRASH TEST and, once the test has been passed, it is issued with the CE marking.

TECNOACUSTICA produces the integrated RAILNOISE barrier with the H4a classification and with a height ranging from 2.2 metres up to 5 metres. TECNOACUSTICA has gained recognition as a production site for the construction of INTEGAUTOS, the integrated motorway barrier for Italy, to be installed in the motorway network managed by Autostrade per l'Italia.

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Photovoltaic Noise Barriers

The integration of solar and renewable technologies in our natural environment is a rapidly growing reality, of which there are now numerous examples worldwide. In Europe some key projects can be found in the EU's programme for the 100 communities that aim to satisfy 100% of their energy needs with renewable energy.

TECNOACUSTICA, together with the Company IRIS, a development expert on topics related to renewable energy, is involved in the design and production of a new integrated photovoltaic panel, shaped in such a way as to combine the best acoustic properties of sound insulation and sound absorption and the best solar exposure features in a panel in order to obtain the maximum yield from the electrical point of view.

The construction of sections of noise barrier with our panel called TW 95AVF8 allows Public Authorities to solve the noise problem and to pay off the investment over time using the energy yield from the solar panels.

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Noise Reducer

The noise diffractor is an item that is installed on the upper edge of a noise barrier, enhancing its performance by acting on sound wave propagation at the point where it is diffracted by the screen. With the installation of this device it is possible to reduce the height of the barrier, with the same acoustic result, thus obtaining a benefit in terms of the visual impact of the barrier.

TECNOACUSTICA has three types of diffractor:

  • OCTAGONAL reducer
  • ELIPTICAL reducer
  • SUPER reducer

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The types of diffractors we offer are the result of past experiences in developing this technology where tests showed that the result depended on:

  • width of the reducer
  • continuity of sound insulation, inside the reducer there should be also a sound-blocking septum that starts from the base of the reducer
  • density of the noise absorbing material.
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