Study of sound absorption by using acoustic impedance tube
Acoustic absorption is the process of reducing sound energy by passing sound waves through a medium or striking a surface. The absorptivity is the property of a material that converts the acoustic energy of sound waves into another form of energy, usually heat, so as to control noise within a bounda...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2012
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| Online Access: | http://hdl.handle.net/10356/50309 |
| _version_ | 1826110684788686848 |
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| author | Chan, Qi Si. |
| author2 | Huang Xiaoyang |
| author_facet | Huang Xiaoyang Chan, Qi Si. |
| author_sort | Chan, Qi Si. |
| collection | NTU |
| description | Acoustic absorption is the process of reducing sound energy by passing sound waves through a medium or striking a surface. The absorptivity is the property of a material that converts the acoustic energy of sound waves into another form of energy, usually heat, so as to control noise within a boundary. The absorptivity of a given material depends on frequency and is affected by size, shape, location, and the mounting method used.
The experiments carried out in this project were aimed mainly to explore a number of parameters which affect sound absorption. These parameters include the perforation distribution on the perforated plate and the different material combinations of multi-perforated plates. The effects of porous materials were also investigated in this project.
Specimens were fabricated for the experiments, and a two-microphone impedance tube was used to study how the sound absorption coefficient of a micro-perforated plate is affected by the above mentioned parameters. The results are then analysed and presented in this report. |
| first_indexed | 2024-10-01T02:38:31Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/50309 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:38:31Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/503092023-03-04T18:33:25Z Study of sound absorption by using acoustic impedance tube Chan, Qi Si. Huang Xiaoyang School of Mechanical and Aerospace Engineering DRNTU::Science::Physics::Acoustics and sound Acoustic absorption is the process of reducing sound energy by passing sound waves through a medium or striking a surface. The absorptivity is the property of a material that converts the acoustic energy of sound waves into another form of energy, usually heat, so as to control noise within a boundary. The absorptivity of a given material depends on frequency and is affected by size, shape, location, and the mounting method used. The experiments carried out in this project were aimed mainly to explore a number of parameters which affect sound absorption. These parameters include the perforation distribution on the perforated plate and the different material combinations of multi-perforated plates. The effects of porous materials were also investigated in this project. Specimens were fabricated for the experiments, and a two-microphone impedance tube was used to study how the sound absorption coefficient of a micro-perforated plate is affected by the above mentioned parameters. The results are then analysed and presented in this report. Bachelor of Engineering (Mechanical Engineering) 2012-05-31T08:18:11Z 2012-05-31T08:18:11Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/50309 en Nanyang Technological University 45 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Acoustics and sound Chan, Qi Si. Study of sound absorption by using acoustic impedance tube |
| title | Study of sound absorption by using acoustic impedance tube |
| title_full | Study of sound absorption by using acoustic impedance tube |
| title_fullStr | Study of sound absorption by using acoustic impedance tube |
| title_full_unstemmed | Study of sound absorption by using acoustic impedance tube |
| title_short | Study of sound absorption by using acoustic impedance tube |
| title_sort | study of sound absorption by using acoustic impedance tube |
| topic | DRNTU::Science::Physics::Acoustics and sound |
| url | http://hdl.handle.net/10356/50309 |
| work_keys_str_mv | AT chanqisi studyofsoundabsorptionbyusingacousticimpedancetube |