Acoustic Black Hole Lightweight Superstructure with Low Frequency Broadband High Efficiency Sound Insulation Mechanism and Experimental Study

doi:10.7652/xjtuxb201910018

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Acoustic Black Hole Lightweight Superstructure with Low Frequency Broadband High Efficiency Sound Insulation Mechanism and Experimental Study

更新时间：2025-07-09

- Acoustic Black Hole Lightweight Superstructure with Low Frequency Broadband High Efficiency Sound Insulation Mechanism and Experimental Study
- Vol. 53, Issue 10, Pages: 128-134(2019)
- 作者机构：
  
  1. 西安交通大学机械结构强度与振动国家重点实验室,西安,710049
  2. 西安石油大学电子工程学院,西安,710065
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201910018
  CLC： O422.4
- Online First：10 October 2019，
  
  Published：2019
- 稿件说明：
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Acoustic Black Hole Lightweight Superstructure with Low Frequency Broadband High Efficiency Sound Insulation Mechanism and Experimental Study[J]. 2019, 53(10): 128-134.
DOI：

Acoustic Black Hole Lightweight Superstructure with Low Frequency Broadband High Efficiency Sound Insulation Mechanism and Experimental Study[J]. 2019, 53(10): 128-134. DOI： 10.7652/xjtuxb201910018.

摘要

针对低频声波在传播过程中穿透力强、难衰减这一问题

研究了一种新型声学黑洞超结构

结合了声学黑洞和声学超结构的优点

通过改变曲面形状实现了低频宽带高效隔声。在一块10 mm厚薄板上

以阵列形式嵌入多个声学黑洞单元

完成声学黑洞既轻且薄的超结构设计。将设计好的声学黑洞超结构用3D打印技术制作出来

通过驻波管实验对声学黑洞超结构隔声特性进行验证。分析实验数据得到

声学黑洞超结构在50～1 600 Hz的频带上平均隔声量可以达到将近30 dB

并且在100～600 Hz频段内平均隔声量高达40 dB。研究了当声学黑洞单元几何形状幂函数的幂指数发生变化时

声学黑洞超结构隔声量的变化。因为设计好的声学黑洞超结构对加工工艺要求较高

在实际的工程应用中并不方便

所以最后还设计了一款方便实际工程应用的声学黑洞超结构

进行了实验验证

并分析了参数变化时对此结构隔声量的影响。研究的声学黑洞轻质超结构在航天航空、汽车、舰船等需要小尺寸结构实现低频大宽带降噪情况下有潜在的应用前景。

Abstract

Low frequency sound wave has strong penetrating force and difficult attenuation in the propagation process.A new acoustic black hole superstructure is investigated.Multiple acoustic black hole units are embedded in an array on a 10 mm thin plate.The designed superstructure of acoustic black hole is produced by 3D printing technology

and the acoustic characteristics of the superstructure are verified by standing wave tube experiment.According to the analysis of experimental data

the acoustic black hole superstructure can achieve an average sound insulation of nearly 30 dB in the frequency band of 50-1 600 H-

and an average sound insulation of up to 40 dB in the frequency band of 100-600 H-.When the power exponent of the geometric shape power function of the acoustic black hole element changes

the sound insulation of the acoustic black hole superstructure is also discussed.Because the designed superstructure of acoustic black hole requires high processing technology and is not conven

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references

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