AN ANALYTICAL STUDY OF INTERIOR NOISE CONTROL USING SEGMENTED PANELS

Abstract

This paper presents initial analytical studies of a new method for active interior noise control. The method proposes to control the vibration of segmented trim panels in order to reduce interior noise levels. Since trim panels are often made of light-weight and stiff composite materials, this actuation strategy will enable the creation of active trim panels for interior noise control without using heavy duty structural actuators. The segmentation would provide abilities for both structural sound transmission and active noise control. Numerical studies are performed to demonstrate the effectiveness of segmented trim panels as acoustic control sources. Geometrical design considerations are also studied. A comparison of the forces required for suppressing acoustic pressure is made between segmented trim panels and direct actuation on a single-piece trim panel.