초록 ▼

An active noise control system includes sensors 16,26 which detects noise 114 and provides electronic signals to an active noise control (ANC) controller 20. The controller provides electronic anti-noise signals to a speaker 24 which is connected to, and provides acoustic anti-noise into, a pluralit

An active noise control system includes sensors 16,26 which detects noise 114 and provides electronic signals to an active noise control (ANC) controller 20. The controller provides electronic anti-noise signals to a speaker 24 which is connected to, and provides acoustic anti-noise into, a plurality of active resonators 120-124. The resonators 120-124 are disposed successively along the propagation direction of the noise 114 and provide time-delayed anti-noise acoustic output signals each of which attenuates a portion of the noise 114. The phasing of the anti-noise signals from the resonators 120-124 may be accomplished by acoustic and/or electronic time delays.

대표청구항 ▼

[ I claim:] [1.] An active noise control system, comprising:sensing means for detecting noise and for providing noise signals indicative of said noise;noise control means responsive to said noise signals and for providing electronic anti-noise signals;at least two interconnected active resonators;ac

[ I claim:] [1.] An active noise control system, comprising:sensing means for detecting noise and for providing noise signals indicative of said noise;noise control means responsive to said noise signals and for providing electronic anti-noise signals;at least two interconnected active resonators;actuator means responsive to said electronic anti-noise signals and disposed on said resonators for providing acoustic anti-noise signals into said resonators; andsaid resonators being disposed successively along the propagation direction of said noise and each providing anti-noise acoustic output signals having a time delay between output signals from said interconnected resonators wherein at least one of said resonators has a predetermined depth which provides said time delay and said time delay being substantially equal to the propagation time of said noise between said two resonators, such that each of said output signals attenuates a portion of said noise.