Sound-absorbing Board with Partially Glued Rear Cover

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Solution Overview

Problem

Perforated sound-absorbing building panels face issues with dirt accumulation due to air exchange through perforations, leading to reduced aesthetic appeal and sound absorption efficiency when covered with film elements to prevent dirt, and existing solutions compromise either visual appeal or sound absorption.

Innovation Solution

A sound-absorbing building board design where the rear cover is not fully glued to the base body, allowing partial vibration and increased sound absorption, while minimizing air exchange and dirt accumulation by using a partially connected cover and incorporating a fiber element on the front for enhanced sound absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the rear cover is fully glued to the base body to prevent air exchange and dirt accumulation, then the visual appearance is improved, but the sound absorption coefficient is significantly reduced

Engineering Contradiction:

Improvedirt accumulationVSAvoidsound absorption coefficient

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The rear cover is divided into a fixed central area (glued to base body) and a movable peripheral area (not glued), allowing different regions to serve different functions: the fixed area prevents dirt accumulation while the movable area maintains sound absorption

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the rear cover have different connection properties to the base body - the central region is firmly glued to prevent dirt entry, while the peripheral region remains unglued to allow vibration for sound absorption

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If film elements are glued on over the entire surface to prevent air transport and dirt accumulation, then the visual appearance is improved, but the sound absorption coefficient is significantly reduced

Engineering Contradiction:

Improvedirt particle accumulationVSAvoidsound absorption coefficient

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The cover is segmented into fixed and movable zones, with only the necessary central area glued down, allowing the peripheral film to vibrate freely for sound absorption while still providing dirt protection where needed

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of fully gluing the entire cover surface, only a partial area (the fastening area) is glued, providing just enough fixation to prevent dirt accumulation while leaving sufficient area movable for acoustic performance

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If the rear cover is not glued at all to allow maximum vibration, then the sound absorption coefficient is maximized, but air exchange and dirt accumulation occur

Engineering Contradiction:

Improvesound absorption coefficientVSAvoiddirt particle accumulation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The cover is divided into fixed and movable zones, with only the necessary central area glued down, allowing the peripheral film to vibrate freely for sound absorption while still providing dirt protection where needed

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #3Local quality

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 design maintains an attractive visual appearance, enhances sound absorption by allowing partial vibration of the rear cover and reducing dirt accumulation, thereby improving both aesthetic and acoustic performance.

Implementation Method 1

A sound pulse hitting the perforated building board leads to a partial lifting or vibrating of the rear cover

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

Sound absorption usually means the reduction of sound energy in a room. Sound absorption is the loss of sound energy when it hits boundary surfaces, objects or people in a room. The loss occurs primarily through the conversion of sound into heat (dissipation).

Methodology Applied

Scientific EffectAcoustic absorption: Acoustic Absorption

Data Source

PatentEP2408976B9Sound-absorbing construction board

Publication Date: 2016.09.28 KNAUF GIPS KG

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AI summary

The invention relates to a sound-absorbing construction board, in particular for wall or ceiling installation, having a front side facing the sound source, a back side facing away from the sound source, and a plurality of perforations comprising a prescribed geometry, in particular having a round, oval, or rectangular cross section, and extending from the front side, through the sound-absorbing construction board, to the back side, wherein the perforations are covered by at least one substantially airtight cover on the back side, wherein the at least one back side cover is connected, in particular glued, to the back side of a base body of the construction board comprising the perforations, so that a mounting surface is smaller than a total back side area of the back side of the base body, removing a perforation proportion of the back side.