5. Active closed-loop control
5.1 Analog systems
When a reference signal strongly correlated with the noise to be reduced is not available to drive the control system, the error signal can be used, after processing by the controller, to drive the secondary source: this is known as active closed-loop control (figure 5 c ).
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Active closed-loop control
Appendix: signals and systems
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In Éditions Techniques de l'Ingénieur
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