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In recent times the use of acoustic materials has been dramatically increased due to cognizance of the noise pollution alongside to enhance the human comforts particularly in building acoustics. Among various acoustic materials, the perforated plates are unique due to its high acoustic performance in low frequencies, ease of installation, fatigue life and low maintenance. It can be used to create panel cells which is an alternative to the wood partitions used in office cubicles, conference rooms and halls which not only, are aesthetically pleasing but also reasonably efficient. The proposed paper, herein, contains the detailed investigation of various acoustic models proposed to estimate acoustic properties of various types of perforated plates. Three major types of perforated plates have been analyzed such as perforated plates (2 Nos.), micro perforated plates (2 Nos.) and slotted plates (2 Nos.). Analytical methods like (a) Johnson-Champoux-Allard equivalent fluid model (JCA), (b) Atalla-Sgard model, (c) Maa model along with recently proposed models by (d) Rice, (e) Phong-Papamoschou and (f) Vigran have been evaluated and implemented during investigations. Transfer Matrix approach was used for the combinations to find out the sound transmission loss. Experiments in acoustic impedance tube and transmission loss tube have been conducted for various arrangements to examine the estimated results and to find out optimal one for perforated plates in hand. Summarizing, the intention of proposed analytical and experimental investigations is to discuss strength and weakness of each models used to estimate acoustic properties of perforated plates.
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