An active control strategy for the scattered sound field control of a rigid sphere.

Abstract

This article proposes a control strategy that combines optimized loudspeaker arrays using constrained matching pursuit and zero pressure constrained points. The proposed control strategy is used to optimize the loudspeaker placement of an active control system that aims to control the scattered sound field of a rigid sphere. Compared to the strategy employing uniformly placed loudspeaker arrays, the proposed control strategy has a better reduction performance in the square target area and less amplification in other areas. This advantage becomes greater with increases in the power constraint on the secondary loudspeaker and the frequency of the primary field.