Simulation of sound absorption performance of am acoustic materials

Alex Alfin Sinty (2022) Simulation of sound absorption performance of am acoustic materials. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Over the past 200 years, the classic sound absorption issue has not been solved, and its research has been modified at every stage in response to real-world needs and modern technologies. Acoustic metamaterial has been introduced in order to improve the classic sound absorption material. Due to their significant research and development over the previous 30 years, acoustic metamaterials (AMs) have gained interest. The traditional sound absorption challenge of determining broad operating band and low-frequency absorption is given new life by utilizing these materials in particular. These studies aim to determine which material that have suitable acoustical properties to be design as acoustic metamaterial for sound absorption and obtain the sound absorption coefficient of the Acoustic Metamaterial and investigate which have best sound absorption performances. In this study an Aerogel, ceramic foam, and metal foam will be tested to be a metamaterial with a design of sandwich structure and honeycomb core structure. This is to overcome the world's noise problem that lately become worse as a result of population growth. These configuration and material proven can give better sound absorption performance. The analysis of these research is conducted in SOLIDWORKS as the model design software and COMSOL Multiphysics as the simulation software for the acoustical behavior of the metamaterials and configurations. The parameters that measured is the sound absorption coefficient, to determine the performance of the acoustic metamaterials. These study results proven that Aerogel metamaterial is the most performing material to absorb sound and in lower frequencies and high frequency range as it has maximum sound absorption coefficient of 0.9779 at low frequency and 0.9998 at high frequency while the other metamaterial which is ceramic, and metal have 0.9239 and 0.5424 respectively at low frequency and 0.9959 and 0.9218 respectively at high frequency.

Item Type:	Academic Exercise
Keyword:	Sound absorption , Acoustic materials , Classic sound
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering > TK5101-6720 Telecommunication Including telegraphy, telephone, radio, radar, television
Department:	FACULTY > Faculty of Engineering
Depositing User:	DG MASNIAH AHMAD -
Date Deposited:	11 Oct 2022 12:03
Last Modified:	11 Oct 2022 12:03
URI:	https://eprints.ums.edu.my/id/eprint/34397

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