Attractive room acoustic design for multi-purpose halls

Attractive interior design and comfort are both required for well-being in multi-purpose halls. Current architectural trends, which favour strongly reflecting materials like concrete or glas, do not aid acoustic requirements in such spaces, In order to achieve acoustic comfort, a room must exhibit an adequate reverberation time down to low frequencies. Furthermore, depending on the main use other quantities such as clarity etc. may also become important. It is shown by means of already completed demonstration projects, that acoustic comfort and attractive design can harmonize by using novel fibreless absorbers recently developed at the Fraunhofer-IBP.