Perforated Casing Acoustic Component Bass Absorption
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Solution Overview
Problem
Existing solutions for improving room acoustics, particularly in offices and meeting rooms, are ineffective in the bass range and lack stability and protection, with known sound absorbers failing to adequately address issues like reverberation, frequency dependence, and background noise.
Innovation Solution
An acoustic component featuring an open-pored material influencing element surrounded by a casing, which protects the material and enhances sound absorption in the bass range by slowing down sound waves and reducing kinetic energy, while being stable and easy to install as a retrofit solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sound absorbers are covered with soundproof plates or thin layers, then protection and stability are improved, but sound absorption effectiveness deteriorates
Solution Approach 1:
The patent applies a perforated plate instead of solid soundproof plates to cover the sound absorber. The perforated design allows sound waves to pass through while the plate provides structural protection and stability. This resolves the contradiction by maintaining sound absorption effectiveness while improving protection and stability.
Solution Approach 2:
The patent uses open-pored material as the core sound absorbing element. This porous structure allows sound waves to penetrate and be absorbed effectively. When combined with the perforated plate covering, it maintains absorption effectiveness while adding protection.
2Ease of operation
If known sound absorbers are used, then installation simplicity is improved, but effectiveness in bass range deteriorates
Solution Approach 1:
The patent specifies that the open-pored material should have a thickness of at least 10 cm to effectively absorb bass frequencies. This parameter change (increased thickness) improves bass range absorption while maintaining installation simplicity as a retrofit solution.
3Loss of energy
If open-pored material is exposed without casing, then sound absorption effectiveness is improved, but protection from damage deteriorates
Solution Approach 1:
The patent uses a perforated plate as a protective casing that covers the open-pored material. The plate is designed with perforations to allow sound waves to reach the absorbing material while providing mechanical protection and preventing dust accumulation.
Solution Approach 2:
The perforated plate acts as an intermediary between the sound waves and the open-pored material. It allows sound to pass through while protecting the material from physical damage and environmental factors.
4Volume of moving object
If sound absorbers are placed close to walls, then installation space is improved, but sound absorption effectiveness deteriorates
Solution Approach 1:
The patent recommends placing the sound absorber at a distance from the wall, utilizing the third dimension (depth/distance from wall) rather than just floor space. This creates a sound-proof air gap that enhances bass absorption while maintaining compact installation.
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 acoustic component effectively reduces room resonances and frequency-dependent group delay, improving clarity and speech intelligibility by damping sound waves in the bass range, thus enhancing overall room acoustics with minimal installation effort.
Implementation Method 1
the open-pored material, sound waves in the bass range are essentially an impacting wind that is slowed down in the openings or corridors, undergoes a phase shift and loses a (frequency-dependent) part of its kinetic energy. This happens, among other things, through minimal deformation of the open-pored material.
Data Source
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AI summary
Acoustic component (10) comprises: an influencing element (1) made up of a porous material; and a sheathing (2), which at least partially surrounds the influencing element. Independent claims are also included for: (1) a room comprising the acoustic component or many acoustic components, where each influencing element of the acoustic component is arranged at a distance of at least 2 cm, preferably 2-100 cm, or up to one eighth of the largest dimension of the room in terms of length, width and height, and is arranged at a distance of 5-65 cm from at least one wall of the room; and (2) applying the acoustic component, comprising introducing at least one acoustic component in the room, where the room is an office, a conference or a meeting room, and/or the dimension of the room in terms of length and width is 3-10 m, respectively.