Low sound immissions into rooms have become more and more important for the construction of large buildings such as hotels, hospitals, or conference centres. Particularly near airports, major roads, and railway lines, the acoustic shielding of ambient noise is, in many cases, difficult to handle with classical passive methods. In modern architecture, fa?ades serve as the outer skin of a building and so have to fulfil the demand of static strength. However, if fa?ades are planned in a suitable way, they can act as a barrier for incident sound fields (for example by the use of active noise control). The investigation of the possibilities for a reduction of structure borne sound using active techniques is the object of a research project initiated by the German Ministry of Education and Research. One of the central questions of the project is the investigation and the experimental detection of the lower natural frequencies and eigenmodes on a reference fa?ade. The mode shapes were then compared with the results of numerical FEM calculation. The next step is to find an actuator design for generating anti-vibrations. After that, suitable positions for the actuators and an appropriate control system must be determined and implemented into a fa?ade element. At the conference, the results of the first year of research will be presented. This will include a report on the experiment conducted at the facade test facility, the calculations to determine the natural frequencies and the mode shapes of the reference fa?ade as well as the first tests with a scaled down demonstrator.
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