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US 12,548,543 B2Granted
Active sound-cancellation system for an open fluid-duct
AssigneeNovio Sound B.V.
InventorsArthur Perry Berkhoff, David George Bradford
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Abstract
The present invention is in the field of an active sound-cancellation system, an open fluid-duct comprising such an active sound-cancellation system, such as an air duct, and an active sound-cancellation computer program comprising instructions for operating such an active sound-cancellation system. The active sound-cancellation system reduces noise significantly.
Claims20
An active sound-cancellation system for an open fluid-duct comprising
- a carrier, the carrier comprising
- at least one fixator for fixing the carrier to the duct,
- at least one axial array of ns×ms audio sensors and na×ma audio actuators, wherein, each individually, na,s≥2, and ma,s≥1, wherein ns sensors and na actuators are parallel to the axis of the duct, and wherein ma,s∈[2,26], and
- at least one sound-cancellation controller, wherein the at least one sound-cancellation controller is configured to receive audio input from the at least one sensor array, configured to process said audio input, and configured to provide output to the at least one actuator array, wherein said output activates the actuator to reduce sound in a frequency domain of 10 Hz-100 kHz, wherein at least one sound-cancellation controller is adaptable,
- characterized in that
- in the longitudinal direction at least one sensor and at least one actuator are each individually spaced apart, at a distance of 1-25% of a duct diameter.
3 more elements
Dependencies are inferred from the claim text.