Multi-Layer Sound Insulation Panel for Lightweight STC Control
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Solution Overview
Problem
Existing sound insulation materials are heavy and do not effectively combine sound insulation, damping, and absorption properties, limiting their sound transmission loss performance.
Innovation Solution
A flexible lightweight multi-layer panel composed of high-density sound insulation layers, sound damping layers, medium-density sound reflection layers, and low-density sound absorption layers, with specific materials and layer sequences to achieve a Sound Transmission Class (STC) of at least 40 dB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dense sound insulation materials are used to increase sound insulation properties, then sound transmission loss is improved, but the weight of the panel increases
Solution Approach 1:
The panel is divided into multiple functional layers including high-density sound insulation layers, sound damping layers, medium-density sound reflection layers, and low-density sound absorption layers. Each layer performs a specific sound control function, allowing the system to achieve high sound insulation properties without requiring any single layer to be excessively dense or heavy.
Solution Approach 2:
The patent employs a composite structure combining different materials with complementary properties: polymer composites for sound insulation, polyurethane foam for damping, and synthetic fibers for absorption. This composite approach allows optimization of both sound insulation performance and weight, achieving STC ≥ 40 dB while maintaining lightweight construction.
2Weight of stationary object
If simple sandwiched design is used to reduce weight, then panel weight is reduced, but sound insulation property is not maximized
Solution Approach 1:
Rather than using a simple two-layer sandwich structure, the patent segments the panel into five distinct functional layers. This segmentation allows each layer to be optimized for its specific function (insulation, damping, reflection, or absorption), thereby maximizing overall sound insulation performance while maintaining lightweight construction.
Solution Approach 2:
Each layer of the panel is designed with specific local properties tailored to its function. For example, high-density layers provide insulation where mass is needed, while low-density absorption layers provide sound absorption where weight should be minimized. This localized optimization of material properties enables both weight reduction and maximized sound insulation performance.
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 achieves a sound transmission loss of at least 40 dB with a reduced weight, addressing the need for lightweight construction materials with enhanced sound insulation properties.
Implementation Method 1
construction materials having sound insulating properties are dense and heavy materials that would reflect the sound back into a room without penetrating through the other side
Implementation Method 2
the inner batt mineral wool or fiberglass from the inside can absorb the transmission sound
Implementation Method 3
at least two sound damping layers (2)
Data Source
AI summary
The present invention provides a flexible lightweight sound insulation panel composed of multiple layers aligned in a sequence of high-density sound insulation layer, sound damping layer, medium-density sound reflection layer, low-density sound absorption layer, medium-density sound reflection layer, sound damping layer, and high-density sound insulation layer. The sound damping layer is composed of polyurethane foam. The flexible lightweight multi-layer panel has Sound Transmission Class (STC) of at least 40 dB according to ASTM E90.