4.7 Article

Acoustic properties of honeycomb like sandwich acoustic metamaterials

Journal

APPLIED ACOUSTICS
Volume 199, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2022.109016

Keywords

Sound insulation; Helmholtz resonator; Honeycomb sandwich structure; Acoustic metamaterials; Transmission loss

Categories

Funding

  1. BJAST Young scholar programs [B YS202003]
  2. Beijing Natural Science Foundation [1182011, 1222021]
  3. National Natural Science Foundation of China [11604015]
  4. Technology Qimeng [J016-09]

Ask authors/readers for more resources

This paper proposes a honeycomb-like sandwich acoustic metamaterial that can effectively control low-frequency noise. By establishing finite element models and analyzing the effects of different parameters, the role of Helmholtz resonators in transmission loss is studied. Experimental results confirm the excellent sound insulation performance of this acoustic metamaterial.
w frequency noise has strong penetrability and has always been an important part of environmental pollution. Limited by the law of mass, traditional lightweight porous materials are difficult to effectively control low-frequency noise. Based on the characteristics of honeycomb structure, Helmholtz resonator and acoustic metamaterials, a kind of honeycomb like sandwich acoustic metamaterials is proposed. This structure combines the lightweight characteristics of honeycomb sandwich structure and Helmholtz resonance characteristics. The finite element models of honeycomb and Helmholtz resonators element are established. The transmission loss (TL) characteristic shows that Helmholtz resonators element will be a TL peak in a narrow frequency band than honeycomb element. The effects of neck diameter, neck length and cavity volume of Helmholtz resonator on its TL are analyzed. The TL of single and multiple Helmholtz resonators are compared. Furthermore, The TL of honeycomb panel and honeycomb like sandwich acoustic metamaterials are analyzed. The results show that the different TL peaks can be introduced into honeycomb like sandwich acoustic metamaterials with different neck diameters. Each Helmholtz resonators element plays an active role in its own frequency band. The sound insulation performance of the honeycomb like sandwich acoustic metamaterials is tested by impedance tube experiment. Excellent sound insulation ability is confirmed. The reasonable design of honeycomb like sandwich acoustic metamaterials structural parameters can solve the problem of low-frequency noise of thin-layer lightweight structure. (c) 2022 Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available