Reducing low-frequency noise radiation from a concrete box girder bridge using acoustic short circuits
Yuanpeng He, Xinghuan Wang, Yuyang Yao, Xiaozhen Sheng · 2024
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Description
Yuanpeng He and co-authors study a way to quiet low frequency noise from concrete railway bridges in this 2024 paper. Box girder bridges on urban viaducts radiate rumble between 20 and 200 hertz. That rumble disturbs nearby residents. Most fixes rely on isolating vibration or absorbing sound.
Their idea cuts holes in the bridge wings to create acoustic short circuits. Air pressure equalizes through the holes, which cancels part of the radiated sound. Modeling first showed which bridge parts contribute most noise. With the holes, noise fell by up to 6.8 decibels at standard measurement points. A design rule based on a 3 decibel effectiveness distance is proposed. It aims for stable reduction across sites.
Catalog record
| CREATOR | Yuanpeng He, Xinghuan Wang, Yuyang Yao, Xiaozhen Sheng |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 57 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |