Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

This review article is concerned with metamaterials, i.e. specifically engineered structures with special properties for interaction with sounds. The research on and practical design of these materials have gained momentum in the last decade, when 3D printing techniques provided the possibility to fabricate such geometrically complex structures. We briefly describe the history of research on AMMs and group them into active and passive metamaterials. For each of these groups of AMMs, we discuss the most notable construction achievements and outline the main applications. We conclude this review with a discussion of possible directions for further research and main applications of AMMs such as noise attenuation, acoustic lens, and the cloaking phenomenon.
Go to article

Authors and Affiliations

Bartłomiej Sztyler
1
Paweł Strumiłło
1

  1. Institute of Electronics, Lodz University of Technology, Poland
Download PDF Download RIS Download Bibtex

Abstract

The problem of reducing noise in transportation is an important research field to prevent accidents and to provide a civilised environment for people. A material that has recently attracted attention in research to reduce noise is acoustic metamaterial, and most of the research projects so far have been limited to the case of static media without flow. We have studied the sound transmission properties of the acoustic metamaterials with turbulent flow to develop the acoustic metamaterials that are used in transportation. In this paper, the effects of geometrical structure, convection, and eddy on sound propagation in the acoustic metamaterials with turbulent flow are investigated, and the relationships between them are analysed. The effects of convection and eddy reduce the resonant strength of the sound transmission loss resulting from the unique geometry of the acoustic metamaterials, but move the resonant frequencies to opposite directions. In addition, when the convective effect and the eddy effect of the airflow, as well as the intrinsic interaction effect generated from the unique geometrical structure of the acoustic metamaterials cannot be ignored, they exhibit competition phenomena with each other, resulting in a widening of the resonance peak. As a result, these three effects cause the shift of the resonance frequency of the sound transmission loss and the widening of the resonance peak. The results of this study show that even in the case of turbulent flow, the metamaterials can be used for transportation by properly controlling its geometric size and shape.
Go to article

Bibliography

1. Ananthan V., Bernicke P., Akkermans R., Hu T., Liu P. (2020), Effect of porous material on trailing edge sound sources of a lifting airfoil by zonal oversetles, Journal of Sound and Vibration, 480: 115386, doi: 10.1016/j.jsv.2020.115386.
2. Bok E., Park J.J., Choi H., Han C.K., Wright O.B., Lee S.H. (2018), Metasurface for water-to-air sound transmission, Physical Review Letters, 120(4): 044302, doi: 10.1103/PhysRevLett.120.044302.
3. Brookea D.C., Umnova O., Leclaire P., Dupont T. (2020), Acoustic metamaterial for low frequency sound absorption in linear and nonlinear regimes, Journal of Sound and Vibration, 485: 115585, doi: 10.1016/j.jsv.2020.115585.
4. Carpio A.R., Avallone F., Ragni D., Snellen M., van der Zwaag S. (2019), Mechanisms of broadband noise generation on metal foam edges, Physics of Fluids, 31(10): 105110, doi: 10.1063/1.5121248.
5. Chaitanya P., Joseph P., Ayton L.J. (2020), Leading edge profiles for the reduction of airfoil interaction noise, AIAA Journal, 58(3): 1118–1129, doi: 10.2514/1.J058456.
6. Deuse M., Sandberg R.D. (2020), Different noise generation mechanisms of a controlled diffusion aerofoil and their dependence on Mach number, Journal of Sound and Vibration, 476: 115317, doi: 10.1016/j.jsv.2020.115317.
7. Du L., Holmberg A., Karlsson M., Åbom M. (2016), Sound amplification at a rectangular t-junction with merging mean flows, Journal of Sound and Vibration, 367: 69–83, doi: 10.1016/j.jsv.2015.12.042.
8. Fan L., Chen Z., Zhang S., Ding J., Li X., Zhang H. (2015), An acoustic metamaterial composed of multi-layer membrane-coated perforated plates for low-frequency sound insulation, Applied Physics Letters, 106(15): 151908, doi: 10.1063/1.4918374.
9. Gikadi J., Föller S., Sattelmayer T. (2014), Impact of turbulence on the prediction of linear aeroacoustic interactions: Acoustic response of a turbulent shear layer, Journal of Sound and Vibration, 333(24): 6548–6559, doi: 10.1016/j.jsv.2014.06.033.
10. Gu Z., Gao H., Liu T., Li Y., Zhu J. (2020), Dopant-modulated sound transmission with zero index acoustic metamaterials, The Journal of the Acoustical Society of America, 148(3): 1636–1641, doi: 10.1121/10.0001962.
11. Jiang X., Li Y., Zhang L.K. (2017), Thermoviscous effects on sound transmission through a metasurface of hybrid resonances, The Journal of the Acoustical Society of America, 141(4): EL363–EL368, doi: 10.1121/1.4979682.
12. Jung J.W., Kim J.E., Lee J.W. (2018), Acoustic metamaterial panel for both uid passage and broadband soundproofing in the audible frequency range, Applied Physics Letters, 112(4): 041903, doi: 10.1063/1.5004605.
13. Kundu P.K., Cohen I.M., Dowling D. (2012), Fluid mechanics, 5th ed., pp. 564–571, Elsevier, doi: 10.1016/C2009-0-63410-3.
14. Kusano K., Yamada K., Furukawa M. (2020), Aeroacoustic simulation of broadband sound generated from low-Mach-number flows using a lattice Boltzmann method, Journal of Sound and Vibration, 467: 115044, doi: 10.1016/j.jsv.2019.115044.
15. Li Y., Assouar B.M. (2016), Acoustic metasurfacebased perfect absorber with deep subwavelength thickness, Applied Physics Letters, 108(6): 063502, doi: 10.1063/1.4941338.
16. Lu K., Wu J., Guan D., Gao N., Jing L. (2016), A lightweight low-frequency sound insulation membrane- type acoustic metamaterial, AIP Advances, 6(2): 025116, doi: 10.1063/1.4942513.
17. Menter F. (1994), Two-equation eddy-viscosity turbulence models for engineering applications, AIAA Journal, 32(8): 1598–1605, doi: 10.2514/3.12149.
18. Nardini M., Sandberg R.D., Schlanderer S.C. (2020), Computational study of the effect of structural compliance on the noise radiated from an elastic trailing-edge, Journal of Sound and Vibration, 485: 115533, doi: 10.1016/j.jsv.2020.115533.
19. Ostashev V.E., Wilson D.K. (2016), Acoustics in Moving Inhomogeneous Media, 2ed., pp. 27–62, Taylor and Francis, doi: 10.1201/b18922.
20. Park J.J., Park C.M., Lee K.J., Lee S.H. (2015), Acoustic superlens using membrane-based metamaterials, Applied Physics Letters, 106(5): 051901, doi: 10.1063/1.4907634.
21. Pierce A.D. (2019), Acoustics: An Introduction to Its Physical Principles and Applications, 3rd ed., pp. 68– 70, Springer, doi: 10.1007/978-3-030-11214-1.
22. Qu S., Sheng P. (2020), Minimizing indoor sound energy with tunable metamaterial surfaces, Physical Review Applied, 14(3): 034060, doi: 10.1103/PhysRevApplied.14.034060.
23. Romani G., Ye Q.Q., Avallone F., Ragni D., Casalino D. (2020), Numerical analysis of fan noise for the NOVA boundary-layer ingestion configuration, Aerospace Science and Technology, 96: 105532, doi: 10.1016/j.ast.2019.105532.
24. Su H., Zhou X., Xu X., Hu G. (2014), Experimental study on acoustic subwavelength imaging of holeystructured metamaterials by resonant tunnelling, The Journal of the Acoustical Society of America, 135(4): 1686–1691, doi: 10.1121/1.4868395.
25. Sui N., Yan X., Huang T.Y., Xu J., Yuan F.G., Jing Y. (2015), A lightweight yet sound-proof honeycomb acoustic metamaterial, Applied Physics Letters, 106(17): 171905, doi: 10.1063/1.4919235.
26. Szoke M., Fiscaletti D., Azarpeyvand M. (2018), Effect of inclined transverse jets on trailing-edge noise generation, Physics of Fluids, 30(8): 085110, doi: 10.1063/1.5044380.
27. Szoke M., Fiscaletti D., Azarpeyvand M. (2020), Uniform flow injection into a turbulent boundary layer for trailing edge noise reduction, Physics of Fluids, 32(8): 085104, doi: 10.1063/5.0013461.
28. Tang H., Lei Y.L., Li X.Z. (2019), An acoustic source model for applications in low Mach number turbulent flows, such as a large-scale wind turbine blade, Energies, 12(23): 4596, doi: 10.3390/en12234596.
29. Wang X., Zhao H., Luo X., Huang Z. (2016), Membrane-constrained acoustic metamaterials for low frequency sound insulation, Applied Physics Letters, 108(4): 041905, doi: 10.1063/1.4940717.
30. Wang Y., Thompson D., Hu Z. (2019), Effect of wall proximity on the flow over a cube and the implications for the noise emitted, Physics of Fluids, 31(7): 077101, doi: 10.1063/1.5096072.
31. Yang Z.J. et al. (2015), Topological acoustics, Physical Review Letters, 114(11): 114301, doi: 10.1103/Phys RevLett.114.114301.
32. Yao H., Davidson L. (2019), Vibro-acoustics response of a simplified glass window excited by the turbulent wake of a quarter-spherocylinder body, The Journal of the Acoustical Society of America, 145(5): 3163–3176, doi: 10.1121/1.5109548.
33. Zheng M.Y., Park C., Liu X.N., Zhu R., Hu G.K., Kim Y.Y. (2020), Non-resonant metasurface for broadband elastic wave mode splitting, Applied Physics Letters, 116(17): 171903, doi: 10.1063/5.0005408.
Go to article

Authors and Affiliations

Myong Chol Pak
1
Kwang-Il Kim
1
Hak Chol Pak
1
Kwon Ryong Hong
2

  1. Department of Physics, Kim Il Sung University, Taesong District, Pyongyang, Democratic People’s Republic of Korea
  2. Institute of Natural Sciences, Kim Il Sung University, Taesong District, Pyongyang, Democratic People’s Republic of Korea
Download PDF Download RIS Download Bibtex

Abstract

A challenge for developing acoustic metamaterials (AMMs) is considering the application of broadband muffling and load bearing capacity simultaneously. In this paper, a honeycomb based graded AMM muffler is proposed, which can widen the attenuation band and improve the structural stiffness without any external device by means of integrated design. Firstly, the acoustic and mechanical characteristics of the muffler unit cell are theoretically and numerically studied, and the graded muffler is designed based on these characteristics. The numerical results show that the graded muffler widens the attenuation bandwidth of the unit cell, and the simulation also shows that the graded muffler has greater stiffness than the uniform one. The stiffness driven muffler provides new possibilities for the design of advanced metamaterial with simultaneous sound insulation and load bearing performances.
Go to article

Authors and Affiliations

Gen Li
1 2
Yan Chen
1 2
Huan He
1 3 4

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  2. Institute of Vibration Engineering Research, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  3. MIIT Key Laboratory of Multi-Functional Lightweight Materials and Structures, Nanjing 210016, China
  4. Laboratory of Aerospace Entry, Descent and Landing Technology, Beijing 100094, China
Download PDF Download RIS Download Bibtex

Abstract

In this article, the authors present the geometry and measurements of the properties of an acoustic metamaterial with a structure composed of multiple concentric rings. CAD models of the structure were developed and subsequently used in numerical studies, which included the study of resonant frequencies using the Lanczos method and an analysis of sound pressure level distribution under plane wave excitation using the finite element method. Subsequently, experimental tests were carried out on models with the same geometry produced with three different materials (PLA, PET-G, and FLEX) using a fused deposition modeling 3D printing technique. These tests included: determining insertion loss for a single model based on tests using the measurement window of a reverberation chamber and determining transmission loss through tests in a semi-anechoic chamber. Sound wave resonance was obtained for frequencies ranging from 1700 to 6000 Hz. Notably, the experimental studies were carried out for the same structure for which numerical tests were conducted. The physical models of a metamaterial were manufactured using three different readily available 3D printing materials. The results of laboratory tests confirm that the created acoustic metamaterial consisting of multi-ring structures reduces noise in medium and high frequencies.
Go to article

Authors and Affiliations

Grzegorz Szczepański
1
ORCID: ORCID
Marlena Podleśna
1
ORCID: ORCID
Leszek Morzyński
1
ORCID: ORCID
Anna Włudarczyk
1

  1. Central Institute For Labour Protection – National Research Institute, Warsaw, Poland
Download PDF Download RIS Download Bibtex

Abstract

We theoretically propose a method to achieve an optimum absorbing material through a modulus-near-zero (MNZ) metamaterial immersed in air or water with a change in slit width part. The destructive interference has paved the way to achieve perfect absorption (PA). Depending upon theoretical analysis, an acoustic metamaterial (AMMs) that supports resonance with a monopole (140 Hz) is developed to construct a low-frequency sound-absorbing technology. The dissipative loss effect can be by attentively controlling onto slit width to achieve perfect absorption. When there are thin slit width and visco-thermal losses in the structure, it is observed that they lead to high absorption. We use finite element simulations via COMSOL Multiphysics software to theoretical measurement in impedance tube and show the influence of structural parameters in both mediums. The results are of extraordinary correspondence at low frequency to achieve optimum perfect absorption (99%). That might support AMMs to actual engineering-related applications in the process of mitigating noise, slow sound trapping, notch filtering, energy conversion, and time reversal technology.
Go to article

Authors and Affiliations

Fatma Nafaa Gaafer
1

  1. Department of Science, College of Basic Education, Wasit University, Iraq
Download PDF Download RIS Download Bibtex

Abstract

To realize a structure which can be conveniently tuned to multiple and wideband frequency ranges, a geometrical-stiffening membrane acoustic metamaterial (MAM) with individually tunable multiple frequencies is presented. The MAM is realized by a stacked arrangement of two membrane-magnet elements, each of which has a membrane with a small piece of steel attached in the centre. It can be tuned individually by adjusting the position of its compact magnet. The normal incidence sound transmission loss of the MAM is investigated in detail by measurements in an impedance tube. The test sample results demonstrate that this structure can easily achieve a transmission loss with two peaks which can be shifted individually in a wide low-frequency range. A theoretical consideration is analysed, the analysis shows that the magnetic effect related to this distance leads to a nonlinear attractive force and, consequently, nonlinear geometrical stiffening in each membrane-magnet element, which allows the peaks to be shifted. A reasonable design can make the structure have a good application prospect for low-frequency noise insulation where there is a need to adjust the transmission loss according to the spectrum of the noise source.
Go to article

Authors and Affiliations

Junjuan Zhao
1
Xianhui Li
1
David Thompson
2
Yueyue Wang
1
Wenjiang Wang
1
Liying Zhu
1
Yunan Liu
1

  1. Beijing Key Lab of Environmental Noise and Vibration, Beijing Municipal Institute of Labor Protection, Beijing, China, 100054
  2. Institute of Sound and Vibration Research, University of Southampton, Southampton, UK, SO171BJ

This page uses 'cookies'. Learn more