Broadband noise insulation of windows using coiled-up silencers consisting of coupled tubes
| Autor: | Shuping Wang, Jiancheng Tao, Ian Burnett, Xiaojun Qiu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
Materials science Acoustics Noise reduction Science Traffic noise 02 engineering and technology Low frequency 021001 nanoscience & nanotechnology Silencer 01 natural sciences Article Mechanical engineering Glazing Cross section (physics) 0103 physical sciences Insertion loss Medicine 0210 nano-technology 010301 acoustics Noise (radio) |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
| ISSN: | 2045-2322 |
| Popis: | It has been demonstrated that a staggered window achieves better noise reduction performance than a traditional single glazing one at middle to high frequencies while maintaining a degree of natural ventilation. There is, however, little improvement in the low frequency range. In contrast, this work proposes to apply coiled-up silencers consisting of coupled tubes on the side walls of staggered windows to obtain noise attenuation in a broad band, especially in the low frequency range. Each element in the silencer consists of two coupled tubes with different cross sections so that noise at more frequencies can be attenuated than that with a uniform cross section. The simulation results show that 8.8 dB overall insertion loss can be obtained between 100 and 500 Hz after applying a combination of silencers designed at 7 different frequencies, and the insertion loss of the staggered window is increased from 6.7 to 15.6 dBA between 100 and 2000 Hz for normal incident traffic noise with the proposed silencers installed. The design is validated by the experiments with a 1:4 scale down model. |
| Databáze: | OpenAIRE |
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