A sonic crystal is a pattern of reflecting objects designed to block a specific range of audio frequencies while allowing others to pass. This installation is part of a collaborative research project to examine and measure the effect of the sonic crystals. The partners in the project is Meyer Sound, Technical University of Denmark and Roskilde Festival. The ambition is to elevate the experience for the audience and the results of the research will provide knowledge and experience with using a pattern of objects to help reducing sound propagation or noise.
The sonic crystal installation consists of three different crystals that attenuates 3 different frequencies. The size and distance between the objects determines the frequency that is being attenuated. The installation was placed in the festival area close to TechLab.
We were able to construct the sonic crystal installation and installing the loudspeaker arrangement within the time frame. The purpose of the sonic crystal installation was to attenuate specific frequencies to a degree of it being clearly audible for visitors. This was also the result observed when testing the installation and close to the exact frequency range expected from theory and simulations were measured. These measurements were not conducted by DTU due to unpredictable weather and limited time, but by Meyer Sound who shared their results.