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首页> 外文期刊>Archives of acoustics >Broadening Low-Frequency Band Gap of Double-Panel Structure Using Locally Resonant Sonic Crystal Comprised of Slot-Type Helmholtz Resonators
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Broadening Low-Frequency Band Gap of Double-Panel Structure Using Locally Resonant Sonic Crystal Comprised of Slot-Type Helmholtz Resonators

机译：使用局部共振声晶晶体由槽型Helmholtz谐振器组成的局部共振声音晶体展现了双面板结构的低频带隙

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摘要

An approach is presented to form and broaden the low-frequency band gap of the double panel structure (DPS) by using a locally resonant sonic crystal (LRSC) in this work. The LRSC is made of cylindrical Helmholtz resonators arranged on square lattice. Their designs are similar to a slot-type resonator, but have different depths of slot. Elongating the slit neck inward and distributing the depths of slots produce a broad local resonant band gap at low frequencies: an average insertion loss (IL) of 10.9 dB covering 520 Hz to 1160 Hz with a LRSC of 12 cm width. Next, the effect of porous material filled into the resonators on the local resonant band gap is evaluated. It is shown that filling of porous material into the resonators decreases the height and width of the local resonant band gap. Finally, the transmission losses (TLs) through the DPS with LRSC are calculated as a function of the incident angle of the sound wave for LRSC embedded in porous material and not. The results show that the porous material can be significantly reduce the incident angle dependency of TL through the DPS with LRSC.
机译：通过在该工作中使用局部共振的Sonic Crystal（LRSC），提出一种方法以形成和宽的双面板结构（DPS）的低频带隙。 LRSC由布置在方形格子上的圆柱亥姆霍兹谐振器制成。他们的设计类似于插槽型谐振器，但具有不同的槽深度。将狭缝颈部伸长并分布槽的深度，在低频下产生宽局部谐振带隙：10.9dB的平均插入损耗（IL）覆盖520Hz至1160Hz，LRSC宽度为12cm。接下来，评估将填充到谐振器中的多孔材料对局部谐振带隙的影响。结果表明，将多孔材料填充到谐振器中降低了局部谐振带隙的高度和宽度。最后，通过具有LRSC的DPS的传输损耗（TLS）作为嵌入多孔材料中的LRSC的声波入射角的函数。结果表明，多孔材料可以通过具有LRSC的DPS显着降低T1的入射角依赖性。

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