Noise control of dipole source by using micro-perforated panel housing

Xi, Q.; Choy, Yat Sze; Li, Cheng; Tang, Shiu Keung

doi:10.1016/j.jsv.2015.09.047

Cited by 19 publications

(4 citation statements)

References 28 publications

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“…Immediately outside the cavity wall, a hollow tube with non-uniform cross section is employed with side width W * and upper width H * . Thus, the MPPHQ device is formed from the original MPP housing device [13] and the newly introduced hollow tube. A dipole source is located at the mid-point of the MPPHQ: x * = 0.5 Lc * , y * = 0.5 h * .…”

Section: Numerical Model Of a Mpphqmentioning

confidence: 99%

“…In addition, the measurements at one point at the upstream outlet were contaminated by the sound pressure at the downstream outlet. Therefore, the dipole component was extracted from the real noise source during signal processing for the theoretical validation [13]. was negative or zero in the frequency range from 500 Hz to 800 Hz.…”

Section: Experimental Studymentioning

confidence: 99%

“…This device is attractive but it is still bulky and special apparatus is required to apply tensile force on the membrane. To address these problems, the membrane can be replaced by an MPP to control the first two blade passing frequencies (BPFs) in the low and medium frequency ranges, thereby effectively achieving sound cancellation and sound absorption due to the MPP [13]. The device becomes an expansion chamber housing device with the covering MPP (hereinafter, MPP housing).…”

Section: Introductionmentioning

confidence: 99%

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Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube

et al. 2019

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Section: Numerical Model Of a Mpphqmentioning

confidence: 99%

Section: Experimental Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube

et al. 2019

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“…How to achieve low-frequency and broadband noise reduction in a limited size has become the focus of current research on engineering noise reduction [3]. Micro perforated plate (MPP) resonant acoustic structure has the advantages of light weight, high cleanliness, and the ability to work in harsh environments, and is widely used in fields such as noise reduction in daily life, aircraft sound liner design [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Broaden the sound absorption band by using micro-perforated plate back cavities with different cross-sectional areas

Yan

Zhang

et al. 2023

Phys. Scr.

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In finite size micro-perforated plate structure, the cross-sectional area size of back cavity will affect the resonant frequency of structure. Based on transfer matrix and the characteristics of acoustic propagation in variable cross-section channel, the sound absorption characteristics of the double-layer micro-perforated plate structure with variable cross-section back cavity are studied and analyzed, and a theoretical analysis model of the variable cross-section back cavity micro-perforated plate structure is established. By comparing the theoretical model with the finite element model, the effect of abrupt changes in the cross-sectional area of the back cavity on the noise reduction performance is obtained. As for the double-layer micro-perforated plate in this paper, the bigger the cross-sectional area of back cavity of inner micro-perforated plate, the lower the frequency of first peak absorption coefficient of structure will be and the higher the frequency corresponding to second absorption coefficient peak of structure. Utilizing this feature, a combined micro-perforated plate structure is designed, which has back cavities with different inner cross-sectional areas, and ultimately broadening the structural sound absorption band. Additionally, through using 3D printing technology to produce samples and conducting experimental tests in the impedance tube. Experiments show that the structure can achieve an absorption coefficient of more than 0.8 within the frequency range of 500-1650 Hz, which further improving the noise reduction performance of the MPP structure. The feasibility of variable-sectional back cavity structure for the design of low-frequency and broadband noise reduction absorber is verified.

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Active structural acoustic control for radiated sound power reduction of enclosure with vent holes based on radiation modes

Jeon

Kim

Kook³

et al. 2022

J Mech Sci Technol

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Noise control of dipole source by using micro-perforated panel housing

Cited by 19 publications

References 28 publications

Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube

Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube

Broaden the sound absorption band by using micro-perforated plate back cavities with different cross-sectional areas

Active structural acoustic control for radiated sound power reduction of enclosure with vent holes based on radiation modes

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