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Barriers against traffic noise in europe

The project deals with finding new materials and technological developments in order to drastrically minimise noise pollution. The central role will be a 1:1 size prototype which provides the required information for future constructions.

Without doubt, soundproof walls are one of the most important barriers against traffic pollution. Over recent years, scientists have tried to improve the geometry of walls and flexible modules, and have considered new materials which could be used to minimise traffic noise in polluted areas. This project will: - examine the influences of different geometries on sound - enhance the rapid prototyping of soundproof walls and evaluate the practical use in a 1:1 prototype. Only a thorough theoretical investigation and understanding of sound waves will show the influence of these particular waves within soundproof barriers, resulting in an optimal database to work with. TECHNICAL AIM OF THE PROJECT: - to shorten the process time from calculations to planning and to the final set-up of the barrier - to increase the effect through better research models, geometry and material - to develop a prototype with high potential geometry and absorbing material. In order to get a realistic picture of soundproof barriers (prototype), the whole procedure should be simulated by computers (including the entire finding and other important factors). These models will show the effects for the future. Apart from the aims of the planning approval, the calculation and the prototype result, other goals are to differentiate geometry and to find the optimal material for the final production series. ABSORBING MATERIAL The currently used material for sound protection is based on "stone-wool", which is primarily used in combination with wood and aluminium. A good alternative to the above-mentioned "stone-wool" mixture is the so-called "coarse grained wood and cement mixture" which is a very good absorbing element. Other currently used materials are different types of synthetics such as glass grid. However, there is a tremendous difference between traffic pollution coming from motor and train traffic and the materials needed to adjust to the situation. This is why the various materials differ depending on the purpose. CARRIER MATERIAL At the moment, wood and aluminium are the most commonly used materials in the sound barrier industry. The advantage of a lightweight system is a relatively easy set-up and take down process. However, the central advantage of a heavy weight system is the maximum limitation of noise and its stability in strong winds (the maximum is defined as the limit to technical possibilities). GEOMETRY AND NOISE POLLUTION BARRIERS Since the beginning of the 1980s conventionally vertical sound protection and walls have been in use in AUSTRIA. At first, they were mainly used as sight barriers with a highly reflective surface. Over the years they have not changed in geometry but their surface structure and height have changed. At present, technical standards are highly sound-absorbing walls about six meters high. A new topic has evolved with the EU-guideline from 25 June 2002 dealing with noise pollution. In order to fight this problem, there will be a strategic "noise map" and several action plans by 2007. Keywords: environment, acoustics, traffic noise.
Acronym: 
BATNIE
Project ID: 
3 387
Start date: 
20-07-2004
Project Duration: 
24months
Project costs: 
790 000.00€
Technological Area: 
Acoustic safety
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.