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Acoustic metamaterial design for noise reduction in vacuum cleaner

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Abstract

In this study, we investigate the acoustic metamaterial (AMM) design for flow noise reduction when using a vacuum cleaner. The AMM was based on the principle of Helmholtz resonators, and metamaterial design variables were defined to reduce noise to approximately 1.5 and 2.5 kHz bands. An acoustic simulation was performed considering the thermoviscous effect using the designed AMM, and a transmission loss in the simulation results was calculated using the four-microphone method. Finally, noise experiments were performed on a vacuum cleaner equipped with metamaterial. Through this, the noise reduction performance of metamaterial predicted through simulations was verified, thereby showing the selective implementation of noise reduction in the desired frequency band.

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Abbreviations

τ :

Transmittance

TL :

Transmtion loss

k :

Wavenumber

c :

Sound velocity

ρ 0 :

Density of air

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Acknowledgements

This work was supported by LG Electronics (202003870001) and the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2020R1F1A1074404).

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Authors and Affiliations

  1. Home Appliance & Air Solution Company, LG Electronics, Changwon-si, Gyeongsangnam-do, Korea

    Ki Yong An

  2. School of Mechanical Engineering, Pusan National University, Geumjeong-gu, Busan, Korea

    Hojin Kwon, Jun-Young Jang & Kyungjun Song

Authors
  1. Ki Yong An
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  2. Hojin Kwon
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  3. Jun-Young Jang
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  4. Kyungjun Song
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Corresponding author

Correspondence to Kyungjun Song.

Additional information

Ki Yong An worked as an NVH engineer in the LG Electronics R&D Center. He received an M.S. degree in automotive engineering from Ulsan University. Since 2012, he has currently been working as a senior engineer in LGE. His primary research fields are noise & vibration simulation and experiments of home appliance products.

Hojin Kwon graduated in the Department of Mechanical Engineering at Pusan National University. Now he is studying for master degree. His current research include noise and vibration.

Jun-Young Jang recieved B.S. and M.S. degrees from Pusan National University in 2018 and 2020, respectively. He is currently majoring in noise and vibation in Pusan National University. His current research interests include the acoustic metamaterial and measurement & signal processing.

Kyungjun Song worked as an Assistant Professor in the Department of Mechanical Engineering at Pusan National University. He received a Ph.D. in mechanical engineering from the University of Michigan. His research interests include mechanical meta-structures, acoustics & vibration control, novel control of mechanical wave.

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An, K.Y., Kwon, H., Jang, JY. et al. Acoustic metamaterial design for noise reduction in vacuum cleaner. J Mech Sci Technol 36, 5353–5362 (2022). https://doi.org/10.1007/s12206-022-1002-0

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  • DOI: https://doi.org/10.1007/s12206-022-1002-0

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