A low-frequency anechoic coating under high hydrostatic pressure by pressure balancing strategy
It has always been a challenge to develop low-frequency anechoic coatings under high hydrostatic pressure. Based on active pressure balancing strategy (APBS), the airbag embedding in Helmholtz resonator model is proposed to achieve low-frequency and broadband sound absorption under high hydrostatic...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2025-06-01
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| Series: | Journal of Low Frequency Noise, Vibration and Active Control |
| Online Access: | https://doi.org/10.1177/14613484241307517 |
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| Summary: | It has always been a challenge to develop low-frequency anechoic coatings under high hydrostatic pressure. Based on active pressure balancing strategy (APBS), the airbag embedding in Helmholtz resonator model is proposed to achieve low-frequency and broadband sound absorption under high hydrostatic pressure. Compared with some existing pressure resistance schemes, the proposed anechoic coating has a thinner and lighter structure, lower sound absorption frequency band, and can withstand higher pressure. The proposed anechoic coating achieves sound absorption coefficient larger than 0.5 within the bandwidth of 24.5∼1000 Hz under pressure of 0.1 MPa, and within the bandwidth of 73.6∼1000 Hz under pressure of 5 MPa. The thickness of 10 mm is less than 1‰ of the incident wavelength at 100 Hz. The proposed model provides a new solution to the problem of improving low-frequency sound absorption performance of the anechoic coating under high hydrostatic pressure. |
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| ISSN: | 1461-3484 2048-4046 |