Gypsum Board Laminate Layer for Acoustic Damping
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Solution Overview
Problem
Conventional gypsum boards in building construction exhibit poor acoustical performance and low sound transmission class (STC) ratings, leading to noise pollution and lack of privacy due to the coincidence between human voice frequency and the vibrational range of standard gypsum boards.
Innovation Solution
A gypsum board design featuring a gypsum core with a laminate layer comprising two outer laminate layers with higher elastic modulus than the inner laminate layer, enhancing sound damping capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard gypsum board is used, then the construction is simple and cost-effective, but the acoustical performance is poor and sound transmission class is low
Solution Approach 1:
The patent applies composite materials by combining gypsum core layers with a laminate layer having different acoustic properties. The laminate layer is positioned between the gypsum layers to create a multi-material structure that filters specific frequency ranges, particularly the human voice spectrum, while maintaining the structural integrity provided by the gypsum layers.
Solution Approach 2:
The patent implements local quality by introducing a laminate layer with specific acoustic filtering properties at a localized position within the gypsum board structure. This laminate layer has different material properties than the surrounding gypsum, creating a zone optimized for acoustic performance without compromising the overall structural function of the board.
2Reliability
If gypsum board density is increased to improve sound damping, then sound transmission loss improves, but the weight and handling difficulty increase
Solution Approach 1:
Instead of increasing the density of the entire gypsum board, the patent uses a composite structure where a laminate layer with optimized acoustic properties is integrated between gypsum layers. This approach achieves superior sound damping at the human voice frequency range without requiring the entire board to be heavier or denser.
Solution Approach 2:
The patent changes the acoustic parameters of the board by introducing a laminate layer with specific resonant frequency characteristics. This laminate layer is designed to create a coincidence dip filtering effect at the human voice frequency range (approximately 100-3000 Hz), providing targeted sound damping without requiring uniform increases in board density or weight.
3Object-affected harmful factors
If conventional gypsum board is used, then manufacturing is simple, but noise pollution and lack of privacy occur due to poor sound transmission class
Solution Approach 1:
The patent reduces noise transmission by incorporating a laminate layer with acoustic filtering properties into the gypsum board structure. This composite construction specifically targets the human voice frequency range, creating a coincidence dip that attenuates speech frequencies and provides privacy without requiring complex manufacturing processes.
Solution Approach 2:
The laminate layer acts as an intermediary element between the two gypsum core layers. It mediates the acoustic transmission by creating a coincidence dip at the human voice frequency range, effectively blocking noise transmission while allowing the gypsum layers to maintain structural functions. The laminate serves as an acoustic filter that neither the gypsum layers alone could achieve.
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 modified gypsum board achieves significant sound transmission loss improvements, with STC ratings increased by 20% or more compared to conventional boards, and sound transmission loss exceeding 50 dB at specific frequencies, effectively reducing noise transmission.
Implementation Method 1
allowing the calcium sulfate hemihydrate to react with the water to convert the calcium sulfate hemihydrate into a matrix of calcium sulfate dihydrate
Implementation Method 2
The laminate layer comprises two outer laminate layers sandwiching an inner laminate layer, wherein the two outer laminate layers have a higher elastic modulus than the inner laminate layer
Implementation Method 3
enhancing sound damping capabilities
Data Source
AI summary
The present invention is directed to a gypsum board and a method of making such gypsum board. In one embodiment, the gypsum board comprises a gypsum core including a first gypsum core layer and a second gypsum core layer sandwiching a laminate layer. The laminate layer comprises two outer laminate layers sandwiching an inner laminate layer, wherein the two outer laminate layers have a higher elastic modulus than the inner laminate layer. The method of making the gypsum board includes steps of providing facing materials and corresponding gypsum slurries wherein the laminate layer is provided in-line during the manufacturing process of the gypsum board.