Acoustic Attenuator With Open Aperture For Noise Reduction
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Solution Overview
Problem
Conventional methods for reducing noise, such as solid walls, are expensive, require maintenance, and have poor drainage and limited flexibility in addressing various noise frequencies, necessitating an alternative solution for attenuating acoustic waves effectively.
Innovation Solution
The development of attenuators comprising a body with a substantial elongate open aperture, allowing for resonant frequency band attenuation independent of material and orientation, with optional additional bodies or configurations to cover broader frequency ranges, and arrangements of these attenuators spaced for light and air passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If solid walls are used to reduce noise, then noise attenuation is achieved, but construction cost increases and drainage performance deteriorates
Solution Approach 1:
The patent employs porous absorptive material within the attenuator body to achieve noise attenuation through absorption rather than solid walls. The porous structure allows acoustic energy to be absorbed and dissipated, providing effective noise reduction while maintaining cost-effectiveness and improving drainage capabilities compared to traditional solid barriers.
Solution Approach 2:
The patent utilizes acoustic wave propagation and resonance principles to design the attenuator. The elongate open aperture and cavity structure create acoustic resonance that enhances noise attenuation. The design incorporates drainage features that utilize gravitational flow for water management, replacing the need for expensive solid wall constructions.
2Object-affected harmful factors
If solid walls are used to reduce noise, then noise attenuation is achieved, but drainage performance deteriorates
Solution Approach 1:
The porous absorptive material provides both noise attenuation and improved drainage performance. The porous structure allows water to pass through while absorbing acoustic energy, simultaneously addressing both noise reduction and drainage requirements without the need for separate drainage systems in solid walls.
Solution Approach 2:
The attenuator design incorporates hydraulic principles for drainage, with features that channel water flow away from the noise source. The cavity structure and aperture design facilitate both acoustic resonance for noise attenuation and gravitational flow for effective drainage, resolving the contradiction between these two functions.
3Object-affected harmful factors
If conventional attenuators are used, then noise reduction is achieved, but device complexity increases
Solution Approach 1:
The attenuator is segmented into distinct functional components: the body, the elongate open aperture, the cavity, and the absorptive material. This segmentation allows each component to perform its specific function efficiently while simplifying the overall design and manufacturing process, reducing complexity compared to conventional integrated attenuators.
Solution Approach 2:
The attenuator design achieves multi-functionality by integrating noise attenuation, drainage, and structural support into a single device. The body provides structural support while housing the absorptive material and cavity, the aperture enables both acoustic resonance and water flow, and the overall structure serves as both a noise barrier and drainage system, reducing the need for separate components.
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 solution provides effective noise reduction across specific or broad frequency bands without material or orientation limitations, allowing for flexible and cost-effective implementation in various applications while maintaining drainage and air flow.
Implementation Method 1
a first body (12, 40) defining a cavity (14, 42) therein and an elongate open aperture (20, 44) extending across a substantial portion of the first body (12, 40), the first body (12, 40) being configured to attenuate acoustic waves over a resonant frequency band
Data Source
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AI summary
An attenuator for attenuating acoustic waves, the attenuator comprising: a first body defining a cavity therein and an elongate open aperture extending across a substantial portion of the first body, the first body being configured to attenuate acoustic waves over a resonant frequency band.