Corrugated Acoustic Panel Core for Thin Low-Frequency Attenuation

The patent transforms the resonating chamber structure from a simple thickness-dependent design to a multi-dimensional configuration using corrugated walls with varying depths. The chambers extend in multiple directions with different wall depths creating varied chamber volumes, allowing low frequency noise attenuation without increasing overall panel thickness. The corrugated pattern creates depth variation within the same panel thickness footprint.

The panel is segmented into multiple regions with different corrugation patterns, wall depths, and chamber configurations. This segmentation allows different portions of the panel to target different frequency ranges while maintaining overall low frequency attenuation capability within constrained thickness. Each segment can be optimized independently for specific acoustic performance requirements.

The patent employs corrugated walls with curved profiles instead of flat surfaces. The curved corrugations provide structural reinforcement similar to arches in architecture, distributing mechanical loads more effectively across the panel. This curvature strengthens the panel structure without requiring increased thickness, maintaining structural integrity while meeting space constraints.

The patent utilizes composite construction combining the corrugated core structure with facing sheets. This composite architecture distributes structural loads across multiple components, enhancing overall strength and stiffness. The corrugated core acts as a structural rib that reinforces the panel while the thin facing sheets provide surface continuity, achieving high strength-to-thickness ratio.

The patent creates three-dimensional corrugated structures within the two-dimensional panel plane. The corrugations extend perpendicular to the panel surface at varying depths, creating effective chamber volumes that would normally require greater thickness. This dimensional transformation allows the panel to achieve low frequency noise attenuation in a thinner profile by utilizing depth variation rather than overall thickness increase.

The corrugated structure nests multiple chamber levels within the panel thickness. Shallower corrugations are positioned within deeper corrugation valleys, creating nested chamber configurations. This nesting maximizes the effective acoustic chamber volume within the constrained thickness, allowing sufficient resonance chamber volume for low frequency attenuation without exceeding space constraints.