The options for improving the acoustical conditions in architectural heritage buildings can be extremely limited. This was also the case for the Jubileumzaal at KU Leuven's University Hall, which suffered from long-standing complaints about high noise levels and low speech intelligibility during social gatherings, when hundreds of conversations are taking place simultaneously. None of the surface finishings of the room could be modified. In a recent research study with Jan Van den Wyngaert, Marie Verlinden and Gerrit Vermeir, sound absorbing chandeliers have been developed, designed, tested, and finally applied in the room. The result is not only aesthetically pleasing, but also effective: the reverberation time reduced from 5.1 to 2.2s at mid frequencies, and the noise level at full capacity decreased from 85 to 81 dB(A). However, it was also found that the effectiveness of the chandeliers would be substantially improved if some of the walls could be made more sound absorbing, as this would decrease the directionality of the sound field. The full study, which has just been published in Applied Acoustics, can be consulted at https://lnkd.in/de2XUDSr (temporary free access). KU Leuven Faculty of Engineering Science Department of Civil Engineering - KU Leuven #acoustics #construction #architecture #engineering
Congratulations with the resultats and thank you for sharing!
Scientist at Empa, Laboratory for Acoustics & Noise Control
10moCongratulations. We're all looking forward to the next ISMA reception!