scholarly journals ON NONLINEAR ACOUSTIC RESISTANCE OF A PERFORATED PLATE

1978 ◽  
Vol 27 (5) ◽  
pp. 600
Author(s):  
ZHAO SONG-LING ◽  
LU YUAN-WEI
Keyword(s):  
Perforated Plate ◽  
Acoustic Resistance ◽  
Nonlinear Acoustic

scholarly journals A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption

2021 ◽  
Vol 11 (13) ◽  
pp. 6180
Author(s):  
Xin Li ◽  
Bilong Liu ◽  
Chong Qin
Keyword(s):  
3D Printing ◽  
Sound Absorption ◽  
Numerical Models ◽  
Characteristic Impedance ◽  
Perforated Plate ◽  
Low Frequency ◽  
Low Frequencies ◽  
Perforated Plates ◽  
Absorption Bandwidth ◽  
Acoustic Resistance

A perforated plate with stepwise apertures (PPSA) is proposed to improve sound absorption for low frequencies. In contrast with an ordinary perforated plate with insufficient acoustic resistance and small acoustic mass, the perforated plate with stepped holes could match the acoustic resistance of air characteristic impedance and also moderately increase acoustic mass especially at low frequencies. Prototypes made by 3D printing technology are tested in an impedance tube. The measured results agree well with that of prediction through theoretical and numerical models. In addition, an absorber array of perforated plates with stepwise apertures is presented to extend the sound absorption bandwidth due to the introduced multiple local resonances.

Improvement of acoustic resistance equations in perforated plate absorbers with thin porous layers

2015 ◽  
Vol 63 (5) ◽  
pp. 415-423 ◽  
Author(s):  
Ivan Vican ◽  
Kristian Jambrosic ◽  
Hrvoje Domitrovic
Keyword(s):  
Perforated Plate ◽  
Porous Layers ◽  
Acoustic Resistance

Multiphysics Computational Analysis of a Perforated Plate Cooling Flow

2021 ◽  
Author(s):  
Justin M. Pesich ◽  
Nicholas J. Georgiadis ◽  
Mark P. Wernet
Keyword(s):  
Computational Analysis ◽  
Perforated Plate ◽  
Cooling Flow

Evaluation of NO emissions characteristics in a CO2-Free micro-power system by implementing a perforated plate

2021 ◽  
Vol 145 ◽  
pp. 111150 ◽  
Author(s):  
Tao Cai ◽  
Dan Zhao ◽  
Yuze Sun ◽  
Siliang Ni ◽  
Weixuan Li ◽  
...  
Keyword(s):  
Power System ◽  
Perforated Plate ◽  
Micro Power ◽  
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