Double-Walled Noise Barrier Channels for Broad-Frequency Reduction
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Solution Overview
Problem
Existing noise barriers struggle to adapt to different traffic environments and frequency areas without increasing their overall size or aesthetic appearance, particularly when addressing both high and low-frequency noise sources.
Innovation Solution
A double-walled noise barrier design with internally adjustable sound wave guiding channels, allowing for varying channel lengths and configurations to target specific frequency ranges, combined with acoustic absorption materials for enhanced noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the height of the noise barrier wall is increased to improve noise reduction effectiveness, then the noise reduction performance is improved, but the aesthetic appearance and practical usability are deteriorated
Solution Approach 1:
The patent introduces sound wave guiding channels that extend horizontally along the wall surface, utilizing the horizontal dimension to achieve additional noise reduction without increasing the vertical height of the wall. This allows the noise barrier to maintain its aesthetic appearance while improving noise reduction effectiveness through a different spatial dimension.
Solution Approach 2:
The sound wave guiding channels are integrated within the structure of the noise barrier wall itself, nesting the noise control functionality inside the existing wall structure. This allows the channels to be housed within the wall without adding external bulk or affecting the overall aesthetic appearance of the noise barrier.
2Adaptability or versatility
If different sized attachments are mounted onto walls to address different frequency areas, then the adaptability to different traffic environments is improved, but the device complexity and overall size are increased
Solution Approach 1:
The noise barrier wall is designed as a universal structure that can address multiple frequency areas through integrated sound wave guiding channels of different lengths built into the wall itself. This eliminates the need for separate attachments for different frequency ranges, reducing device complexity while maintaining adaptability to various traffic environments.
Solution Approach 2:
The patent allows for adjustable or variable length channels within the wall structure, enabling the noise barrier to adapt dynamically to different frequency requirements. This flexibility is achieved through the channel configuration rather than through separate attachable components, simplifying the overall device structure.
3Reliability
If longer channels are provided to reduce low frequency noise from high-speed trains, then the noise reduction for low frequencies is improved, but the overall size and bulk of the structure is increased
Solution Approach 1:
The sound wave guiding channels extend horizontally along the length of the noise barrier wall, utilizing the horizontal dimension to achieve the necessary channel length for low frequency noise reduction without increasing the vertical height or overall bulk of the structure. This allows long effective channel lengths while maintaining a compact vertical profile.
Solution Approach 2:
The sound wave guiding channels are merged with the noise barrier wall structure itself, combining the noise barrier function and the sound wave guiding function into a single integrated structure. This eliminates the need for separate external attachments and reduces overall structural bulk while providing the necessary channel length for low frequency noise control.
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 enables effective noise reduction across diverse noise environments while maintaining a consistent overall size and appearance, utilizing sound interference and absorption principles to dampen a broad spectrum of frequencies.
Implementation Method 1
the channel has an inlet for enabling a part of an approaching sound wave to enter and propagate through the channel, and an outlet through which said part of the sound wave is enabled to leave the channel so as to interfere with the original part of the sound wave that propagates above the noise barrier
Implementation Method 2
combined with acoustic absorption materials for enhanced noise reduction
Data Source
AI summary
A noise barrier including a front wall, a rear wall, and two opposite and spaced apart side walls which extend from the front wall to the rear wall. A compartment is enclosed by at least the front wall, the rear wall, and the side walls. A channel is located spaced apart from the enclosed compartment, wherein the channel has an inlet for enabling a part of an approaching sound wave to enter and propagate through the channel, and an outlet through which said part of the sound wave is enabled to leave the channel so as to interfere with the original part of the sound wave that propagates above the noise barrier. The inlet is located in the front wall and faces a noise source area. The outlet is located at a vertically higher level than the inlet and rearward of the front wall.