A composite acoustic black hole for ultra-low-frequency and ultra-broad-band sound wave control

Achieving ultra-low and ultra-broad-band sound absorption and full-band sound insulation is a major challenge. Here, we propose a composite structure of a multilayer micro-perforated plate and acoustic black holes to achieve this purpose. Combining the stable sound absorption effect of the multilaye...

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Bibliographic Details
Published in:Journal of vibration and control 2024-08, Vol.30 (15-16), p.3462-3471
Main Authors: Liang, Xiao, Liang, Haofeng, Chu, Jiaming, Yang, Zhen, Zhou, Zhuo, Gao, Nansha, Zhang, Siwen, Zhou, Guojian, Hu, Congfang
Format: Article
Language:English
Subjects:
Absorption
Absorptivity
Acoustic insulation
Acoustic properties
Acoustic waves
Acoustics
Composite structures
Finite element analysis
Finite element method
Frequencies
Insulation
Multilayers
Perforated plates
Sound transmission
Sound waves
Transmission loss
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Summary:Achieving ultra-low and ultra-broad-band sound absorption and full-band sound insulation is a major challenge. Here, we propose a composite structure of a multilayer micro-perforated plate and acoustic black holes to achieve this purpose. Combining the stable sound absorption effect of the multilayer micro-perforated plate in the full frequency band and the sound insulation effect of the acoustic black hole in the low frequency and the excellent sound absorption effect in the high frequency, the excellent sound control effect of 600–3150 Hz absorption coefficient greater than 0.8 and 100–3150 Hz sound transmission loss greater than 50 dB is achieved. The acoustic properties of different components and different acoustic black hole outlet were evaluated by finite element method, and the principles of sound absorption and insulation of the composite structure were elaborated. Finally, the results of finite element method are verified by impedance tube experiments. This work can make further progress in elucidating the acoustic properties of the ABH and open up new avenues in the control of ultra-low and ultra-wide frequency acoustic waves.
ISSN:1077-5463
1741-2986
DOI:10.1177/10775463231194702