LOW-FREQUENCY SOUND-ABSORBING SCREEN
DOI: 10.33744/0365-8171-2026-119-028-036
archive: archived pipeline: cataloged verified
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Summary
This paper addresses the growing problem of environmental noise pollution caused by increased traffic density in Ukraine, particularly in urban areas. While traffic noise mitigation strategies include reducing vehicle noise levels or zoning restrictions, these are often difficult to implement. Consequently, the authors focus on the installation of noise-protection screens along highways. Existing screens, such as those made of solid concrete or simple perforated walls with conical/pyramidal holes, are ineffective at absorbing low-frequency sound, which is a significant component of traffic noise, especially when parallel tram lines are present. The study aims to develop a high-efficiency sound-absorbing screen specifically designed to attenuate low-frequency noise. The proposed solution is a low-frequency sound-absorbing screen based on a group of Helmholtz resonators. Unlike previous designs that suffered from low acoustic efficiency at low frequencies due to material limitations and short neck lengths, this new design utilizes a labyrinthine structure. The screen consists of a body with multiple cavities formed by left and right walls, partitions, and resonator necks. The key innovation is the resonator neck, constructed from concentric cylinders that telescope into one another, creating a labyrinthine air duct. This configuration significantly increases the effective length of the resonator neck without increasing the overall width of the screen. According to the principles of acoustics described, the resonant frequency is inversely proportional to the square root of the neck length; therefore, a longer neck lowers the resonant frequency, allowing the device to target low-frequency noise. The paper details the structural components, including the left and right walls, partitions, and the telescopic cylinders that form the resonator necks and annular gaps. The mechanism operates by allowing sound waves to enter the labyrinthine necks, where the acoustic energy is absorbed by the resonator cavities at frequencies close to their natural resonance. The authors argue that this design overcomes the limitations of prior art by providing high acoustic efficiency in the low-frequency range while maintaining a compact footprint. The study concludes that the proposed screen is technically feasible, as the physical processes are identical to established resonant absorbers, but the specific labyrinthine geometry ensures effective low-frequency attenuation and structural durability. This design offers a practical solution for mitigating the health and productivity impacts of low-frequency traffic noise in dense urban environments.
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-20 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-21 |
| chunk | success | chunk | — | — | 1 | 2026-06-21 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-21 |
| promote | success | — | — | — | 1 | 2026-06-20 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
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