We investigate sound field control based on the concept of sound zones for the mitigation of low frequency noise from outdoor concerts to the surrounding area by adding secondary loudspeakers to the existing primary sound system. The filters for the secondary loudspeakers are the result of an optimization problem that minimizes the total sound pressure level of both primary and secondary loudspeakers in a sensitive area and the impact of the secondary loudspeakers on the audience area of the concert. We report results from three different experiments with increasing complexity and scale. The sound field control system was reducing the sound pressure level in the dark zone on average by 10 dB below 1 kHz in a small scale experiment in anechoic conditions, by up to 14 dB in a controlled large scale open-air experiment and by up to 6 dB at a pilot test at a music festival.
|Title of host publication||Proceedings of 145th Audio Engineering Society Convention|
|Number of pages||8|
|Publisher||Audio Engineering Society|
|Publication status||Published - 2018|
|Event||145th International Pro Audio Convention - Jacob K. Javits Convention Center, New York, United States|
Duration: 17 Oct 2018 → 20 Oct 2018
|Conference||145th International Pro Audio Convention|
|Location||Jacob K. Javits Convention Center|
|Period||17/10/2018 → 20/10/2018|
Heuchel, F. M., Caviedes Nozal, D., Agerkvist, F. T., & Brunskog, J. (2018). Sound field control for reduction of noise from outdoor concerts. In Proceedings of 145th Audio Engineering Society Convention Audio Engineering Society.