How can three -dimensional printed metal materials a revolution in reducing noise

Links table

Abstract and 1 introduction

2 cell design unit and analysis

3 experimental descriptions and cell cell

4 AM Labyrinthine

4.1 The design and manufacture of the painting

4.2 FE model AM

4.3 AM Description of the board

4.4 AM The results of the painting of the painting

5 numerical evaluation of the various solutions of the maze’s sound absorption board

5.1 MacROCell with support cavity

5.2 Results

Conclusions, estimates and references

The first appendix

Conclusions

In this work, we have provided an experimental guide to the concept on a new approach to relieving noise that exploits a rainbow design using unjustly adjacent materials and combining UCS with changing thickness and side size in arranging semi -periods that ensure good homogeneity in the plate. We have described the design and full health verification procedure, from the numerical design and UC modeling to its description in the Disorder tube, to the design of the composition of the painting, and its achievement using selective laser dressing. The final structure is then experimental in a small resonance room, which indicates that the perfect absorption on the target low frequency scale, centered in 1 kHz, thus verifying the validity of the approach. Finally, the detailed FE simulations allowed the evaluation of possible improvements/modifications to the plate by adding foam filling and foam support cavity. The proposed initial model can be developed, thanks to its standard design, it can be used in various applications, for example in the audio room, in car parts, or general flying. This approach, along with other solutions based on the proposed materials in the literature, contributes to an alternative (or complementary) path to use traditional sound absorption materials to control noise. The proposed solution can be especially attractive due to the relatively low thickness of the panels and the relatively small density of the required parts of nature of the wavelength of the maze material used in the design.

Thanks and appreciation

Fn, VHK, LB, EM, DP, MZ, ASG, LS, FB, thanks for the Alta Scuola Politecnica project. FN, ASG, NMP and FB are supported by Eu H2020 Fet Open “Bohem” Grant No. 863179.

Reference

[1] G

[2] B. Assouar, B. Liang, Y

[3] H. GE, M. Yang, C. MA, MH Lu, Yf Chen, N. Fang, and P. Sheng, Breaking the Harriers: Advances in Acoustic Functional Mateials, National Science Review 5, 159–182 (2018).

[4] X. Zhang, Z. QU, and H. Wang, Metamateials Assoustic Engineering for Sound absorption: from uniform structures to structures, ISCiench 23, 101110 (2020).

[5] S. Kumar and H. Lee, the current and future role of the audio material to reduce architectural and urban noise, audio 1, 590-607 (2019).

[6] J

[7] F. Langfeldt and W. Gleine, improved loss of sound transmission from glass wool with vocal materials, in the facts of the twenty -sixth International Conference on Sound and Vibration, ICSV 2019 (2019).

[8] G. Palma, H. MAO, L. Burghignoli, P. Göransson, and U. IEMMA, Metamaterials Ocoustic in Aeronutics, Applied Sciences, 8 (6), 971 (2018).

[9] M. Yang and P. Sheng, Voice absorption structures: from porous media to sound audio materials, annual review material research 47, 83-114 (2017).

[10] L. Zhao and S. Zhou, besieging a compressed audio rainbow in a vital consuming group of locally equivalent materials, sensors 19, 788 (2019).

[11] M. Yang, g

[12] G

[13] V. romero-garcía, G. Theocharis, O. Richoux, and V. Pagneux, use a complex frequency aircraft to design broadcast absorption and wavelength, American Voice Association Magazine 139, 3395-3403 (2016).

[14] N

[15] V. romero-garciá, G. Theochaaris, O. Richoux, A. Merkel, V. Tournat, and V. Pagneux, ideal and wide audio absorption through the tendon of the associated sub-length in a critical way, scientific reports 6, 19519 (2016)

[16] N Groby, rainbow absorption: wide range, ideal and similar sound absorption by wavelength panels for transmission problems, scientific reports 7, 13595 (2017).

[17] J. Boulvert, J. Costa-BAptista, T Groby, Metaporous folded for the length of the sub -wave and absorbing the perfect videos, applied physics messages 117, 251902 (2020).

[18] J. Boulvert, T Groby absorption, ideal, wide range, wavelength with asymmetric absorptions: perception of channel audio with 3D porphyroidism, Voice and Vibration Magazine 523, 116687 (2022).

[19] Z. Liang and J

[20] Z. Liang, T. Feng, S. Lok, F. LIU, KB NG, CH Chan, J 1614 (2013).

[21] Y. XIE, A. Konneaker, BI POPA, and SA Cummer, Metamaterials Dip Double Maze to match wide range resistance, applied physics messages 103, 201906 (2013)

[22] Sk Maurya, A. Pandey, S. Shukla, and S. Saxena, dual negative in 3D space file materials, scientific reports 6, 33683 (2016)

[23] Y. XIE, BI POPA, L. Zigoneanu, and SA Cummer, Measurement of a bold domain index with satellite sound audio materials, physical audit messages 110, 175501 (2013).

[24] Y. Liu, W. XU, M. Chen, T Wave length scale, materials and design 188, 108470 (2020).

[25] GY Song, Q. Cheng, B. Huang, HY Dong, and TJ Cui, Metamateriaals Voice range broadcast for low -frequency sound attenuation, applied physics messages 109, 131901 (2016).

[26] C. Zhang and X. Hu, Methi is a maze of three dimensions of the audio port: perfect absorption with the large frequency range and spices, physical review application 6, (2016).

[27] Ao krushynska, f

[28] Ao krushynska, f

[29] M. Molerón, M. Serra-Garcia, and C. Daraio, thermal sticky effects on the vocal metamaterials: from the total transition to the total reflection and high absorption, the new magazine of physics 18, (2016).

[30] It is impressive of the basic foam in the study of aircraft, and weadquarters 58, 31-33 (2014).

[31] S. GHINT, P. Bouche, T. Padois, L. Pires, O. Doutres, TC Kone, K. Trici, F. ABDELKADER, R. Panneton, and N. Atalla, Experimental Voice Performance Voice Noise Performance Voice No. Aircraft Camera , In the facts of the 2020 International Conference on the Anti -Noise Engineering, Interoise 2020 (2020).

[32] T

[33] N. Jiménez, O. Omnova, and J.-P. Groby, vocal waves in periodic structures, metamaterales, porous media, separation. “Springer International Publresting, (2021).

[34] Vincent Laude, Phonone crystals (De Gruyter, 2020).

[35] V. romero-garcía, G. Theocharis, O. Richoux, and V. Pagneux, use a complex frequency plane to design broadband absorption and wavelength, American Voice Association Magazine 139, 3395 (2016).

[36] Ao krushynska, f

[37] A. Magnani, C. Marescotti, F. POMPOLI, vocal absorption from single and multiple resonance, vocal applied 186, 108504 (2022).

[38] Y. Wang, H. Zhao, H. Yang, J. Zhong, D. Zhao, Z. Lu, and J

[39] C.

[40] Mr. Stinson, the spread of the sound waves of the plane in the narrow and wide circular tubes, and the circular to uniform pipes of the arbitrary cross -form, the American Voice Association magazine 89, 550 (1991).

[41] ISO 354, Acoustics – Voice absorption measurement in the Echo Room, International Standard (2003).

[42] ASTM, the standard test method for resisting and absorbing vocal materials using a tube, two microphones and digital frequency analysis system, the American Association for Material Test (1990).

[43] ASTM E2611, standard test method for determining the natural injury of porous physical audio properties based on the method of the E2611 transport matrix, the American Association for Material Test (2019).

[44] D. Pilon, r

[45] Mr. Schroeder, “Schroeder Frequency”, American Voice Association Magazine 99, 3240-3241 (1996).

[46] G

[47] C. Zwikker and CW KOSTEN, sound absorption materials, Elsevier (1949).

[48] N

The first appendix

The general theory of the spread of the sound was developed in the Astwan tube [46] Using the linear Navier-Stokes equation. Given the complexity of the analytical solution, Zwiker and Kosten [47] Almost solutions for tight and wide tube diameters have been developed. After that, Stinson [40] Distinguish a rough solution for a long, unlimited tube with an arbitrary transverse shape. This model was used to calculate the contrast contrast along the wrapped tube (Figure 1B). The fine entrance was instead of this using the Johnson Chambox Ald [48]. This model allows to include not only the losses that occur along the entrance, but also those around the opening due to the sudden cross -section contrast.

---