Colas, the leading road construction and maintenance group, and its subsidiary, Somaro, a specialist in safety equipment and road signs and signals, in partnership with the Ecole Polytechnique, have developed a new type of noise barrier for roads with an unequalled level of sound absorption. Depending on the configuration, the barrier’s performance is 30% to 50% greater than that of the most effective sound panels currently available on the market.
This innovative product, for which a patent application has been filed and which has earned the Siemens Prize for Applied Research 2003 for the Ecole Polytechnique (the reputed French school of engineering), is based on a number of theoretical and experimental studies on the properties of irregularly shaped objects. It has been proved that the geometry of objects is of great importance in the deadening of noise. Resonators with a jagged or ragged geometrical shape can therefore deliver better sound deadening than ordinary geometrically smooth systems.
Considering these properties, and bearing in mind, moreover, that it is very difficult to manufacture irregularly shaped objects using inexpensive industrial processes (such as moulding, for instance), the challenge for the team consisted in developing the morphology of an acoustically absorbent material that would be appropriate for moulding.
From parking garage to smart multi-purpose garage
19.07.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO
Efficient and intelligent: Drones get to grips with planning the delivery of goods
12.07.2017 | Alpen-Adria-Universität Klagenfurt
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
26.07.2017 | Physics and Astronomy
26.07.2017 | Life Sciences
26.07.2017 | Earth Sciences