Acoustic Damping Building Material with Dual Energy Pathways
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Solution Overview
Problem
Existing building materials fail to effectively reduce both airborne and impact sound transmissions, particularly in dense habitation areas, as they either occupy excessive space or do not adequately address sound energy transfer through structural layers.
Innovation Solution
A composite acoustic damping building material comprising a substrate and an acoustic damping layer with multiple media configurations, including direct and indirect energy transmission pathways, which absorbs and dissipates sound energy, reducing noise transmission without increasing structural height or space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple layer construction systems are used to reduce noise transmission, then sound reduction performance is improved, but the space occupied in the building structure increases
Solution Approach 1:
The patent combines multiple functional layers (structural flooring sheet, acoustic damping layer with viscoelastic material, and aesthetic surface layer) into a single integrated composite building material. This merging of functions achieves effective sound reduction while minimizing the total space occupied compared to separate multiple-layer construction systems.
Solution Approach 2:
The invention uses composite materials comprising a structural flooring sheet, a viscoelastic acoustic damping layer, and an aesthetic surface layer. The composite structure leverages the complementary properties of each material to achieve both structural integrity and acoustic performance in a compact configuration.
2Object-affected harmful factors
If denser materials are used to reduce noise transmission, then sound barrier performance is improved, but impact acoustic noise transmission is not addressed
Solution Approach 1:
The patent applies different material properties to different functional requirements: the structural flooring sheet provides density for airborne sound blocking, while the viscoelastic acoustic damping layer provides flexibility and energy dissipation for impact noise reduction. Each layer is optimized for its specific function rather than using uniformly dense materials throughout.
Solution Approach 2:
The viscoelastic acoustic damping layer acts as an intermediary between the structural flooring sheet and the aesthetic surface layer. This intermediate layer absorbs and dissipates impact energy, preventing it from transmitting through the structure, while still allowing the denser structural layer to effectively block airborne sounds.
3Ease of operation
If roll out insulating mats are placed between substrate and aesthetic surface layer, then installation flexibility is improved, but sound energy transmission is not effectively reduced
Solution Approach 1:
The patent changes the critical parameter of the acoustic damping layer from being compressible (like roll out mats) to being non-compressible viscoelastic material. This parameter change ensures that the material maintains consistent acoustic damping properties without being compressed by the aesthetic surface layer or subframe, thereby effectively reducing sound energy transmission while remaining easy to install.
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 material effectively reduces airborne and impact sound transmissions by up to 10 dB, meeting or exceeding building code standards for sound reduction, while maintaining structural integrity and minimizing material costs through a single-layer solution.
Implementation Method 1
the acoustic damping layer comprises at least two media wherein the at least two media are configured such that the acoustic damping layer comprises at least one direct energy transmission pathway and at least one indirect energy transmission pathway through the acoustic damping layer to the substrate
Implementation Method 2
the acoustic damping layer being secured to at least a portion of the substrate... the acoustic damping layer comprises at least two media
Implementation Method 3
the substrate layer provides a barrier material which reflects sound fluctuations back into the acoustic damping layer
Data Source
AI summary
An acoustic damping building material (100) comprising an acoustic damping layer (118) secured to at least a portion of a substrate (110). The acoustic damping layer comprises at least two media wherein the at least two media are configured such that the acoustic damping layer comprises at least one direct energy transmission pathway and at least one indirect energy transmission pathway through the acoustic damping layer to the substrate.