Performance Study Of The Combine Microperforated Panel Sound-Absorbing Constructions

The Microperforated panel technology is the 21st century green environmental protection non-textile fiber sound absorber,Its invention makes the great contribution for sound absorber's development, Has solved in the extreme condition, like high temperature, moist, environment and so on under dust pollution acoustic fidelity questions, Also has simultaneously solved the difficult problem which the porous material is not easy to protect, under Mr. Ma Dayou's Theory and design of microperforated panel sound-absorbing constructions, the numerous scientists develop many kinds of material quality the microperforated panel, having solved many problem of acoustic fidelity of construction in the world, such as Great Hall of the People's acoustic fidelity question, the German Parliament hall's acoustic fidelity question, as well as solves sound absorption problem under the high noise special environment, such as solution of the high noise pollution in missile launching produces, the microperforated panel played the very major role. Now the microperforated pane of the different material quality have been made, having developed its application scope greatly, not only being made of metal and glass, but also being made of the punch holes, and also being agglutination.Although the microperforated panel already has widely applied in reality, but some aspect's research also waits for developing theoretically. Main reason of this article is the fundamental research of the combine microperforated panel under the different structure of combination, and completing the data analysis through the computer experiment with a model that simulates the real thing, thus for making fundamental research progress of the combine microperforated panel, and achieving further promotes the microperforated pane to adapt each kind of situation and each kind of decoration request application goal. This article mainly studied the combine microperforated panel 's theory inferential reasoning, the structural change to the sound absorption performance influence, and carried on the theory confirmation using the computer simulation computation. According to the microperforated panel 's accurate theory and the design, take Mr. Ma Dayou's precise theoretical formula as the research mathematics foundation, further infer in the different micro perforation plate's combination situation theoretical formula, in this inferential reasoning's foundation, carries on the design programming separately using VB and the MATLAB, establishes the mathematical model, uses predecessor's to carry on the procedure checking calculation first on single micro perforation plate data, in obtains the data confirmation in the foundation, to the combine microperforated panel to carry on the model computation, a computation minute different situation carries on, makes every effort to be able the thorough understanding to the combine microperforated panel's structure to the sound absorption performance influence, including frequency, sound absorption coefficient, resonance frequency,Resonating sound-absorption coefficient, frequency band width and so on each kind of parameter, when the structure changes the change, specifically speaking the different structure combination's micro perforation plate, the sound absorption performance will have the different direction change, like different housing combination, different punching rate combination, different board thickness combination, these changes to sound absorption performance influence.