Design of sound pro acoustic materials

Asyiq Ataullah Sulaiman (2022) Design of sound pro acoustic materials. Universiti Malaysia Sabah. (Unpublished)

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Abstract

The problem of traditional sound absorption has not been fully solved during the previous 200 years. Its study has changed at every level in response to technological advancements and current demands in the actual world. Acoustic metamaterials (AMs) have drawn a lot of interest since there is still much to learn about them. The ability of technology to assist in resolving global issues has increased. As technology has advanced, 3D printers have been developed so that designers may design and produce a prototype. This is because the material used in 3D printers is sustainable. In this research, it will be focusing more on the simulations where the designs were done in SOLIDWORKS software, and the simulation will be executed using COMSOL Multiphysics. The material used to configure the simulation is polylactic acid (PLA) and stainless-steel where the stainless-steel plates will sandwich together with the design of the PLA. Three designs were created which is a lightweight sandwich-plate with embedded aperture, honeycomb, and disc. The research involves in finding the sound absorption coefficient, transmission loss as well as noise reduction coefficient (NRC). The greatest sound absorption coefficients are 0.8645, 0.9289, and 0.9805 for honeycomb, embedded aperture, and disc, respectively and for transmission loss are 4.3398, 5.4712, and 8.5528, respectively. The simulations were done with the design of embedded aperture is suitable for low frequency whereas the disc is suitable for high frequency. The NRC for the embedded aperture, honeycomb, and disc are 0.4318, 0.1903, and 0.2122, respectively.

Item Type:	Academic Exercise
Keyword:	Sound , Acoustic materials , Sound absorption
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 12:21
Last Modified:	11 Oct 2022 12:21
URI:	https://eprints.ums.edu.my/id/eprint/34427

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