Abstract A novel plenum window with incorporation of sonic crystals (SCs) was investigated using numerical and experimental methods in the present studies. Additional insertion loss (IL) that could be obtained by the 3 SCs was computed through a commercial software and was validated through experimental results from reverberation rooms. Experimental data showed that the SCs could attenuate more traffic and construction noises compared to white noise. When the noise source directly faced the opening of the plenum window, the performances of the SCs in reduced traffic and construction noises were improved significantly especially at low and middle frequency ranges (from 250 Hz to 1250 Hz and from 800 Hz to 2500 Hz for traffic and construction noise, respectively), which covered the designed center and resonant frequencies of the SCs (1000 Hz and 1164 Hz, respectively). For such a case, the SCs were able to attenuate additional 4.2 dBA and 2.1 dBA of traffic and construction noises, respectively, at 1000 Hz. Peak IL was found to be at 630 Hz which was about 5.4 dBA and 5.5 dBA for traffic and construction noise, respectively.

中文翻译：

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用于室内噪声控制的带有声波晶体的新型通风窗

摘要 在本研究中，使用数值和实验方法研究了一种结合了声波晶体 (SCs) 的新型增压窗口。3 个 SC 可以获得的额外插入损耗 (IL) 是通过商业软件计算的，并通过混响室的实验结果进行了验证。实验数据表明，与白噪声相比，SCs 可以衰减更多的交通和施工噪声。当噪声源直接面对通风窗的打开时，SCs 在减少交通和施工噪声方面的性能显着提高，尤其是在中低频范围内（250 Hz 至 1250 Hz 和 800 Hz 至 2500 Hz 的交通噪声）和建筑噪音），其中涵盖了 SCs 的设计中心频率和谐振频率（分别为 1000 Hz 和 1164 Hz）。对于这种情况，在 1000 Hz 时，SC 能够分别额外衰减 4.2 dBA 和 2.1 dBA 的交通和建筑噪音。发现峰值 IL 位于 630 Hz，交通和建筑噪声分别约为 5.4 dBA 和 5.5 dBA。