The MONICA project. WEDNESDAY 19… · The MONICA project. 19 June 2019 DTU Reducing noise levels...
Transcript of The MONICA project. WEDNESDAY 19… · The MONICA project. 19 June 2019 DTU Reducing noise levels...
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Acoustic control loop
Finn Agerkvist
Jonas Brunskog, Franz Heuchel, Diego Caviedes Nozal, Daniel Plewe, Minho Song, Efren Fernandez Grande
The MONICA project
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DTU19 June 2019
Reducing noise levels by anti phase sound
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DTU19 June 2019
The Adaptive Sound Field Control System
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min𝐰
𝜅 𝐇𝐵𝑠𝐰𝑠 2 + 1 − 𝜅 𝐇𝐷
𝑠𝐰𝑠 +𝐇𝐷𝑝𝐰𝑝 2
+ 𝜆 𝐰 2
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DTU19 June 2019
The Adaptive Sound Field Control System
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DTU19 June 2019
Networking components
• Audio signal network : DANTE (local ethernet)
IoT Sound level meters (B&K)
Real time sound level map data (COP)
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DTU19 June 2019
Tests so far
• Laboratory tests in anechoic chamber
(December 2017 and onwards)
• Pre-test Refshaleøen, Copenhagen (May 2018)
• Pilot test Kappa FuturFestival, Torino (July 2018)
• Pilot test Tivoli, Copenhagen (August 2018)
• Sound propagation and weather test Risø, Roskilde
(December 2018)
• Pre-test Roskilde (June 2019)
• Pilot test Kappa FuturFestival, Torino (July 2019)
• Pilot test Tivoli, Copenhagen (September 2019)
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DTU19 June 2019
Pre-test Refshaleøen
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DTU19 June 2019
Pre-test Refshaleøen
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DTU19 June 2019
Pilot test Kappa FuturFestival 2018
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DTU19 June 2019
Pre-test Roskilde (June 2019)
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DTU19 June 2019
Fresh data!!
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DTU19 June 2019
Source Radiation Model
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DTU19 June 2019
Concluding remarks
• Outdoor Sound Field Control works fine in controlled conditions
• Adaptation to changing conditions relies on IoT microphones
• Real time noise level estimation
• Increasing the geometrical complexity degrade the performance
• Number of measured transfer functions needs to be reduced
–Combined model and measurements have now been tested in
ongoing test
• The system needs to go adaptive, adjusting for weather conditions
– testing ongoing this summer
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