A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
Abstract
:1. Introduction
2. Models and Methods
2.1. Theoretical Calculation
2.2. FEM Simulation
2.3. Experiment Measurements
3. Results and Discuss
3.1. Sound Absorption of PPSA and Single Perforated Panle(PP) Absorber
3.2. Sound Absorption of PPSA Absorber with Varied Hole Spacing, Aperture and Plate Thickness
3.3. Sound Absorption of PPSA Absorber Array
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | PPSA1 | PPSA2 | PPSA3 |
---|---|---|---|
d(d1/d2) (mm) | 1.5/4 | 1.5/4 | 1.5/4 |
t(t1/t2) (mm) | 1/1 | 1/1 | 1/1 |
σ(σ1/σ2) (%) | 0.27/1.92 | 0.23/1.60 | 0.18/1.28 |
D (mm) | 25 | 50 | 100 |
Parameters | PPSA | Single PP1 | Single PP2 |
---|---|---|---|
d(d1/d2) (mm) | 1.5/3 | 3 | 1.5 |
t(t1/t2) (mm) | 1/1 | 2 | 2 |
σ(σ1/σ2) (%) | 0.21/0.81 | 1.02 | 1.02 |
Parameters | PPSA | Single PP1 | Single PP2 |
---|---|---|---|
d(d1/d2) (mm) | 2/4 | 4 | 4 |
t(t1/t2) (mm) | 2 | 7 | 2 |
b (mm) | 39.6 | 39.6 | 39.6 |
Parameters | PPSA Absorber Array |
Single PPSA
Absorber | |
---|---|---|---|
Sub-PPSA1 | Sub-PPSA2 | ||
d(d1/d2) (mm) | 1.5/4 | 4 | 1.5/4 |
t(t1/t2) (mm) | 1/1 | 1/1 | 1/1 |
σ(σ1/σ2) (%) | 0.095/0.67 | 0.185/1.315 | 0.28/1.98 |
Sample 1 Parameters | PPSA Absorber Array1 | Single PPSA Absorber1 | |
---|---|---|---|
Sub-PPSA1 | Sub-PPSA2 | ||
d(d1/d2) (mm) | 1.8/3 | 1.8/3 | 1.8/3 |
t(t1/t2) (mm) | 1/1 | 1/1 | 1/1 |
σ(σ1/σ2) (%) | 0.095/0.27 | 0.195/0.54 | 0.29/0.81 |
Sample 2 Parameters | PPSA absorber array2 | Single PPSA Absorber2 | |
Sub-PPSA1 | Sub-PPSA2 | ||
d(d1/d2) (mm) | 1.8/3.8 | 1.8/3.8 | 1.8/3.8 |
t(t1/t2) (mm) | 1/1 | 1/1 | 1/1 |
σ(σ1/σ2) (%) | 0.14/0.615 | 0.275/1.23 | 0.415/1.845 |
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Li, X.; Liu, B.; Qin, C. A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption. Appl. Sci. 2021, 11, 6180. https://doi.org/10.3390/app11136180
Li X, Liu B, Qin C. A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption. Applied Sciences. 2021; 11(13):6180. https://doi.org/10.3390/app11136180
Chicago/Turabian StyleLi, Xin, Bilong Liu, and Chong Qin. 2021. "A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption" Applied Sciences 11, no. 13: 6180. https://doi.org/10.3390/app11136180
APA StyleLi, X., Liu, B., & Qin, C. (2021). A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption. Applied Sciences, 11(13), 6180. https://doi.org/10.3390/app11136180