Aircraft Panel Acoustic Cavities for Noise Attenuation
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Solution Overview
Problem
Current aircraft interior panels lack effective noise attenuation solutions within the constraints of weight, cost, and space, necessitating innovative designs that enhance sound dampening and acoustic treatment without compromising safety or aesthetics.
Innovation Solution
A panel assembly comprising a first panel with an inner and outer surface, and a second corrugated panel with rib members and cavities, where acoustic treatment members are secured between the panels to reduce noise propagation, and additional layers or materials are used to enhance sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If acoustic treatment members are added to the panel assembly, then noise attenuation is improved, but weight increases
Solution Approach 1:
The patent uses acoustic treatment members with porous or fibrous structures (such as acoustic foam, felt, or porous plastics) that trap and dissipate sound waves through their interconnected void spaces. These porous materials provide effective noise attenuation while maintaining relatively low density and weight compared to solid materials of equivalent thickness.
Solution Approach 2:
The panel assembly combines multiple materials with different acoustic and mechanical properties - including the first panel, second panel, rib members providing structural support, and acoustic treatment members for noise control. This composite construction allows optimization of each component for its specific function while achieving overall performance that balances noise attenuation with weight constraints.
2Object-affected harmful factors
If acoustic treatment members are added to the panel assembly, then noise attenuation is improved, but device complexity increases
Solution Approach 1:
The patent integrates the acoustic treatment members directly into the panel assembly structure itself, rather than treating them as separate add-on components. The acoustic treatments are positioned within the cavity formed by the first panel, second panel with rib members, and connecting elements, merging structural and acoustic functions into a unified assembly that reduces overall system complexity.
Solution Approach 2:
The panel assembly is designed to perform multiple functions simultaneously: the first and second panels provide structural support and noise barrier functions, the rib members provide structural reinforcement and define acoustic cavities, and the acoustic treatment members provide noise attenuation. This multi-functional design reduces the need for separate components and simplifies the overall system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The panel assembly effectively attenuates noise by utilizing acoustic treatment members and air pockets, improving passenger comfort while maintaining structural integrity and adhering to weight and safety regulations.
Implementation Method 1
acoustic treatment members are secured between the panels to reduce noise propagation
Implementation Method 2
The panel assembly effectively attenuates noise by utilizing acoustic treatment members and air pockets
Data Source
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AI summary
A panel assembly (10) comprises a first panel (12) having an inner surface (12a) and an outer surface (12b), and a second panel (14) having an inner surface (14a) and an outer surface (14b). The second panel (14) includes at least first and second rib members (16) formed therein that extend inwardly. The first and second rib members (16) each include an inner surface (16a) and an outer surface (16b). At least a first panel portion (18) is defined between the first and second rib members (16). The first panel portion (18) includes an inner surface (18a) and an outer surface (18b). The inner surface (16a) of the first and second rib members (16) are secured to the inner surface (12a) of the first panel (12). The inner surface (18a) of the first panel portion (18) is spaced apart from the inner surface (12a) of the first panel (12) to define at least a first cavity (22), and the inner surface (18a) of the second panel portion (18) is spaced apart from the inner surface of the second panel to define at least a second cavity.