A highway soundproofing device

By combining a stainless steel support wall, rainproof roof, inner panel, resonant cavity, sound-absorbing foam board, and Helmholtz resonant sound-absorbing components, the problem of poor low-frequency noise isolation effect of highway sound insulation devices is solved, achieving efficient noise reduction and long-term stable sound insulation effect.

CN224451444UActive Publication Date: 2026-07-03山西省交通新技术发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
山西省交通新技术发展有限公司
Filing Date
2025-08-11
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing highway sound insulation devices are ineffective at blocking low-frequency noise, have limited sound absorption, and are prone to sound insulation degradation due to rain erosion and sun exposure, making it difficult to meet the noise reduction requirements of complex noise spectrum.

Method used

The structure adopts a combination of stainless steel supporting vertical walls, rainproof roof, inner panel, resonant cavity, sound-absorbing foam board and Helmholtz resonant noise reduction components. It uses the Helmholtz resonator principle to reduce noise, and the sound-absorbing foam board fills the blank areas to form a multi-layer noise reduction mechanism.

Benefits of technology

It effectively isolates and reduces highway noise, avoids noise pollution, has good sound insulation effect, is highly practical, prevents rainwater erosion, and maintains long-term noise reduction effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model belongs to the field of highway noise reduction technology and discloses a highway noise reduction device. The device includes a stainless steel supporting vertical wall installed on the outside of the highway guardrail. The top of the wall has a rainproof roof with a guide channel to prevent rainwater from affecting the internal structure. The side of the supporting vertical wall facing the road has a rigid PVC inner panel with sound-through holes, forming a resonance cavity inside. A Helmholtz resonance noise reduction component is installed at the bottom of the cavity, and the inner wall is lined with sound-absorbing foam made of egg-egg cotton. During operation, vehicle noise enters the resonance cavity through the sound-through holes in the inner panel. The Helmholtz resonance noise reduction component converts sound energy into mechanical vibration energy through a two-stage resonance system formed by the flat resonance cavity and the resonance rod. The sound-absorbing foam absorbs low-frequency noise and fills gaps to prevent sound wave reflection. The auxiliary structure ensures stable operation of the device, ultimately significantly reducing noise through a "conversion-dissipation" closed loop, minimizing the impact on surrounding residents.
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