| Author: | Gu, Ningnan |
| Title: | Study of sound transmission loss using acoustic grating structure |
| Degree: | M.Eng. |
| Year: | 2025 |
| Department: | Department of Building Environment and Energy Engineering |
| Pages: | v, 44 pages : color illustrations |
| Language: | English |
| Abstract: | With the rapid development of today's society, people’s living standards have significantly improved, and people's lives are becoming increasingly convenient and intelligent. At the same time, numerous challenges have emerged, for example, the sources of noise in daily life are also increasing. For example, transport tools such as cars, trains and planes can generate noise during the day. The vibration generated by large machinery and equipment in heavy manufacturing and construction sites during operation also belongs to harmful noise. Drilling and excavation equipment on construction sites can generate low-frequency vibrations which will also be harmful to people’s health. And even the air conditioners used in daily life can also produce noise. Common physiological effects include hearing loss, tinnitus, change of heart rate and so on. Therefore, in order to protect human physical and mental health, the demand for building sound insulation is growing day by day. Because the noise generated in our daily life can not only make it difficult for people to have a good rest but also lower people’s quality of life. If worse, it can even cause psychological illnesses and affect normal physiological functions. So, the control of noise can be mainly divided into two methods. The first one is from the noise source, which means to stop or reduce the generation of vibration. The second one is in the path of noise propagation, which concludes isolation, attenuation, or absorption. However, if we choose the first one, there may be some loss of the machine or product functionality. Here is a study about sound transmission loss which is based on acoustic grating structure. Sound insulation refers to the phenomenon in which sound waves are reduced during propagation due to the obstruction of material, structures, or space. It’s obvious that the density and thickness of the material, as well as the geometric shape of the sound insulation structure, all have different effects on the sound insulation. This article will mainly study sound transmission loss using an acoustic grating structure. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 8540.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 13.49 MB | Adobe PDF | View/Open |
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