Active noise cancelling of a full-sized open domestic window
10 hours ago
- #natural ventilation
- #active noise control
- #urban noise mitigation
- An active sound control system for domestic windows was developed to reduce noise while maintaining natural ventilation.
- The system uses an array of control modules (small loudspeakers) distributed across the window aperture to attenuate incident sound.
- A single reference microphone provides advance information for the controller to compute anti-noise signals in real-time.
- Numerical analysis showed the system outperforms the acoustic insulation of a fully shut single-glazed window under ideal conditions.
- Experimental results demonstrated up to 10-dB reduction in energy-averaged sound pressure level for broadband noise.
- The system is effective for urban transportation noise but has limitations in low-frequency attenuation due to loudspeaker size constraints.
- The study highlights the potential of active noise control for open windows in densely populated, high-rise cities.