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由并联扬声器和多孔材料串联组成的吸声器的吸声性能

Sound Absorption of the Absorber Composed of a Shunt Loudspeaker and Porous Materials in Tandem.

作者信息

Li Xin, Cao Zhigang, Xu Lijun, Liu Bilong

机构信息

Xinjiang Institute of Engineering, Urumqi 830023, China.

School of Mechanical & Automobile Engineering, Qingdao University of Technology, No. 777 Jialingjiang Road, Qingdao 266520, China.

出版信息

Polymers (Basel). 2023 Jul 15;15(14):3051. doi: 10.3390/polym15143051.

DOI:10.3390/polym15143051
PMID:37514440
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10385311/
Abstract

To investigate the sound absorption of the absorber composed of a shunt loudspeaker (SL) and porous materials (PM) in tandem, the normal absorption coefficients for six samples of different groups of parameters are measured using impedance tubes. It is shown that a composite structure consisting of a porous material, an air layer, a shunt loudspeaker, and an air layer arranged in sequence (PM + Air1 + SL + Air2) has the potential to achieve broadband sound absorption close to three octaves in the frequency range of 200-1600 Hz. To further explore the sound absorption mechanism of "PM + Air1 + SL + Air2", a theoretical model based on the transfer matrix method is established, and a numerical model is built in the pressure acoustic module using COMSOL Multi-physics field software. The sound absorption coefficients and acoustic impedances predicted are in good agreement with those measured. The concerned "PM + Air1 + SL + Air2" with suitable parameters has two distinguishable sound absorption peaks in the low frequency domain and a well sound absorption spectrum similar to that of the porous material layer in the high-frequency domain. The reason for the superior sound absorption performance of "PM + Air1 + SL + Air2" lies in the fact that under the common action of the diaphragm's mechanical vibration, the circuit's damping loss, and the porous material's viscous dissipation, the sound energy consumption is mainly dominated by SL in the low frequency domain and captured by PM in the high-frequency domain.

摘要

为了研究由并联扬声器（SL）和多孔材料（PM）串联组成的吸声器的吸声性能，使用阻抗管测量了六组不同参数样本的法向吸声系数。结果表明，由多孔材料、空气层、并联扬声器和空气层依次排列组成的复合结构（PM + Air1 + SL + Air2）在200 - 1600 Hz频率范围内有潜力实现接近三个倍频程的宽带吸声。为了进一步探究“PM + Air1 + SL + Air2”的吸声机理，基于传递矩阵法建立了理论模型，并使用COMSOL多物理场软件在压力声学模块中构建了数值模型。预测的吸声系数和声阻抗与测量值吻合良好。具有合适参数的“PM + Air1 + SL + Air2”在低频域有两个明显的吸声峰值，在高频域有与多孔材料层相似的良好吸声谱。“PM + Air1 + SL + Air2”吸声性能优越的原因在于，在振膜的机械振动、电路的阻尼损耗和多孔材料的粘性耗散共同作用下，低频域声能消耗主要由SL主导，高频域则由PM捕获。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/e2447cddf2da/polymers-15-03051-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/051fd5c5c085/polymers-15-03051-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/a504e68f3e81/polymers-15-03051-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/f615ced96e38/polymers-15-03051-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/245d365728ac/polymers-15-03051-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/78cbfdc91a9a/polymers-15-03051-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/ab13f3a25fce/polymers-15-03051-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/7febd4a6e7a2/polymers-15-03051-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/e2447cddf2da/polymers-15-03051-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/051fd5c5c085/polymers-15-03051-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/a504e68f3e81/polymers-15-03051-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/f615ced96e38/polymers-15-03051-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/245d365728ac/polymers-15-03051-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/78cbfdc91a9a/polymers-15-03051-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/ab13f3a25fce/polymers-15-03051-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/7febd4a6e7a2/polymers-15-03051-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/446d/10385311/e2447cddf2da/polymers-15-03051-g008a.jpg

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本文引用的文献

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Dual frequency sound absorption with an array of shunt loudspeakers.采用并联扬声器阵列的双频吸声
Sci Rep. 2020 Jul 2;10(1):10806. doi: 10.1038/s41598-020-67810-z.
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Thin broadband noise absorption through acoustic reactance control by electro-mechanical coupling without sensor.通过无传感器的机电耦合实现声抗控制的薄宽带噪声吸收。
J Acoust Soc Am. 2014 May;135(5):2738-45. doi: 10.1121/1.4871189.
3
Sound absorption of a finite micro-perforated panel backed by a shunted loudspeaker.由并联扬声器支持的有限微穿孔板的吸声性能
J Acoust Soc Am. 2014 Jan;135(1):231-8. doi: 10.1121/1.4836215.
4
Electroacoustic absorbers: bridging the gap between shunt loudspeakers and active sound absorption.电声吸声器：在分流扬声器和有源吸声之间架起桥梁。
J Acoust Soc Am. 2011 May;129(5):2968-78. doi: 10.1121/1.3569707.