Abstract
The radiated sound power in an enclosure with a vent hole is actively controlled by radiation mode. Active structural acoustic control (ASAC), which generates a sound field through the bending wave of a structure, is suitable for global noise reduction. However, ASAC applications have focused on reducing the transmission noise in completely enclosed structures. Herein, a new ASAC method for reducing the noise in an opened structure is proposed. This method uses radiation mode and optimal control theory simultaneously to achieve sufficient sound power reduction with only a few actuators. The optimal vibration velocity of a panel is controlled by three radiation modes. The proposed method showed a maximum sound power reduction of 14 dB in three actuators, while the existing optimal control algorithm showed only a reduction of 1 dB. They can be used for active noise attenuation of various products with vent holes by reducing the number of actuators required.
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Acknowledgments
This work was mainly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C2013259) and partially supported by GIST Research Institute (GRI) grant funded by the GIST in 2021.
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Onyu Jeon received his Ph.D. in Mechanical Engineering from the Gwangju Institute of Science and Technology (GIST), South Korea. His research interests include active control of sound and vibration, structural acoustics, and active structural acoustic control.
Hyun-Guk Kim is a Senior Researcher of Hanwha Syetem, Yongin, South Korea. He received his Ph.D. in Mechanical Engineering from Gwangju Institute of Science and Technology in 2020. His research interests include design optimization of noise insulation structure and vibration isolator, vibroacoustics, and satellite system design.
Junghwan Kook received his Ph.D. from the School of Information and Mechatronics, Gwangju Institute of Science and Technology (GIST), South Korea (2012). He is a research scientist at the Audio Research, GN Audio. His current research interests multidisciplinary design optimization and vibroacoustic.
Seon Man Kim received his Ph.D. from the School of Information and Mechatronics, Gwangju Institute of Science and Technology (GIST), South Korea (2013). He is a senior research scientist at the Spatial Optical Information Research Center at the Korea Photonics Technology Institute (KOPTI). His current research interests include deep learning-based design optimization and auditory intelligence signal processing.
Semyung Wang received his B.S. from Hanyang University, South Korea (1980); M.S. from Wayne State University, USA (1986); and Ph.D. from the University of Iowa (1991), all in Mechanical Engineering. Since 1995, he has served as Assistant Professor, Associate Professor, Professor, and the Dean of the School of Mechanical Engineering, Gwangju Institute of Science and Technology (GIST), South Korea. His research interests include multidisciplinary design optimization, sound focusing, passive/active noise control, modal testing and analysis, and the applications, analysis, and design of electromagnetic systems.
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Jeon, O., Kim, HG., Kook, J. et al. Active structural acoustic control for radiated sound power reduction of enclosure with vent holes based on radiation modes. J Mech Sci Technol 36, 3313–3327 (2022). https://doi.org/10.1007/s12206-022-0611-y
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DOI: https://doi.org/10.1007/s12206-022-0611-y