Investigating the Effect of Shape on Acoustic Performance of Micro Perforated Absorber at Low Frequencies

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MONAZZAM MOHAMMAD REZA; HASHEMI ZAHRA

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: International Journal of Occupational Hygiene Year:2019 | Volume:11 | Issue:3 Page(s): 164-178

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Title

Investigating the Effect of Shape on Acoustic Performance of Micro Perforated Absorber at Low Frequencies

Author(s)

MONAZZAM MOHAMMAD REZA | HASHEMI ZAHRA | Issue Writer Certificate

Keywords

Micro-Perforated Absorbers

Surface Shapes

Low Frequency

Absorption Coefficient

Abstract

Nowadays, Micro-Perforated Absorbers are one of the structures that are widely used. The sound absorption mechanism is performed by viscous energy losses in the cavities on the plate. This paper was examined the effect of the surface shape on the micro-perforated absorber performance at low frequencies (less than 500 Hz). The three-dimensional finite element method was used to predict the Absorption Coefficient of this group of adsorbents. Also, the results obtained from the shaped absorbers were compared with the flat Micro-Perforated Absorbers. After validating the numerical results, six different designs were defined as the surface shape of the micro-perforated plates in the COMSOL Multiphysics, Ver. 5. 3a software. The results reflected the fact that the factor of the surface shape can be used as a contributing factor in some frequencies. In general, the dented or concave shapes provided better outcomes than other flat designs and shapes and the convex or outward shapes bring the weakest results.

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APA: Copy

MONAZZAM, MOHAMMAD REZA, & HASHEMI, ZAHRA. (2019). Investigating the Effect of Shape on Acoustic Performance of Micro Perforated Absorber at Low Frequencies. INTERNATIONAL JOURNAL OF OCCUPATIONAL HYGIENE, 11(3), 164-178. SID. https://sid.ir/paper/752847/en

Vancouver: Copy

MONAZZAM MOHAMMAD REZA, HASHEMI ZAHRA. Investigating the Effect of Shape on Acoustic Performance of Micro Perforated Absorber at Low Frequencies. INTERNATIONAL JOURNAL OF OCCUPATIONAL HYGIENE[Internet]. 2019;11(3):164-178. Available from: https://sid.ir/paper/752847/en

IEEE: Copy

MOHAMMAD REZA MONAZZAM, and ZAHRA HASHEMI, “Investigating the Effect of Shape on Acoustic Performance of Micro Perforated Absorber at Low Frequencies,” INTERNATIONAL JOURNAL OF OCCUPATIONAL HYGIENE, vol. 11, no. 3, pp. 164–178, 2019, [Online]. Available: https://sid.ir/paper/752847/en

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