Sound manipulation using acoustics metamaterial
Also available in printed version
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| Format: | Bachelor thesis |
| Language: | English |
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Universiti Teknologi Malaysia
2025
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| Online Access: | https://utmik.utm.my/handle/123456789/52788 |
| Abstract | Abstract here |
| _version_ | 1854934113326202880 |
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| author | SitI Nur Nashya Azlika Hamidon |
| author2 | Siti Zaleha Abd. Rasid, supervisor |
| author_facet | Siti Zaleha Abd. Rasid, supervisor SitI Nur Nashya Azlika Hamidon |
| author_sort | SitI Nur Nashya Azlika Hamidon |
| description | Also available in printed version |
| format | Bachelor thesis |
| id | utm-123456789-52788 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-527882025-08-21T00:45:47Z Sound manipulation using acoustics metamaterial SitI Nur Nashya Azlika Hamidon Siti Zaleha Abd. Rasid, supervisor Electrical engineering Also available in printed version This paper proposes the development and application of acoustic metamaterial in sound manipulation. The main advantage of this study is improving sound manipulation in noise control of conventional materials through the use of metamaterial. A unit cell of the metamaterial is developed using wavelength equation and concept of Helmholtz resonator to obtain suitable measurement and design. This unit cell is simulated in Comsol Multiphysics to determine the eigenfrequency of the structure. The unit cells are arranged in a 100 mm square acoustic enclosure inner faces. Then, five samples of acoustic enclosures are fabricated using different materials. Wood acoustic enclosure is built using manual fabrication, acrylonitrile butadiene styrene (ABS) and poly lactic acid (PLA) acoustic enclosures are fabricated digitally using three-dimensional (3D) printing method, and PLA acoustic enclosure with metamaterial is also fabricated using 3D printing method with 1 and 5 mm thickness of wcavity of unit cells. These acoustic enclosures undergo testing of sound reduction towards frequency varied from 200 to 1000 Hz. Based on this experiment, the PLA acoustic enclosure with metamaterial of 5 mm wcavity is able to reduce sound level better than the rest of acoustic enclosures with the highest reduction of sound pressure level, 26.1 dB occurred on 800 Hz zulaihi UTM 72 p. Project Paper (Sarjana Muda Kejuruteraan (Elektrik)) - Universiti Teknologi Malaysia, 2017 2025-03-14T07:37:09Z 2025-03-14T07:37:09Z 2017 Bachelor thesis https://utmik.utm.my/handle/123456789/52788 vital:111479 valet-20180607-142156 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Electrical engineering SitI Nur Nashya Azlika Hamidon Sound manipulation using acoustics metamaterial |
| thesis_level |
Other
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| title | Sound manipulation using acoustics metamaterial |
| title_full | Sound manipulation using acoustics metamaterial |
| title_fullStr | Sound manipulation using acoustics metamaterial |
| title_full_unstemmed | Sound manipulation using acoustics metamaterial |
| title_short | Sound manipulation using acoustics metamaterial |
| title_sort | sound manipulation using acoustics metamaterial |
| topic | Electrical engineering |
| url | https://utmik.utm.my/handle/123456789/52788 |
| work_keys_str_mv | AT sitinurnashyaazlikahamidon soundmanipulationusingacousticsmetamaterial |