The Study on Sound Insulation of Light Weight Wall
| Autor: | Darming Juang, 莊達明 |
|---|---|
| Rok vydání: | 1993 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 81 For the need of structure and constructing, partitions of high- rise buildings are gradually made of light-weight walls. Its merits of light-weight theoretically cause less property than masonary materials─brick or concrete in the performance of sound insulation. Furthermore, there is lacking sound insulation data of light-weight walls interiorly. The aim of this research is mainly in studying the performances of commonly available partition on the market, the differences between measurement and calculation and the factors of sound transmission loss. The main contents of the thesis are outlined in four parts as follows: (1) Investigation and Sortation─ There are 89 pieces of tests to be distributed into nine types according to the combinations of partitions. (2) Apply "sound intensity method" to measure sound transmission loss of the partitions, and use D-curve system to assess their sound insulation. Among these partitions, the worst one is the formica hollow wall with wood skeleton structure. The best one is the hollow wall filling with glasswool made of double gypsum panels. (3) Sound insulation performances of these partitions can be generalized into four types. They are ①single panel② coincidence with smooth curve ③coincidence with sharp curve ④ double panel. Comparing the laboratory measurement with calculation of mass law, when frequency is higher, the difference is more. For example, at 2KHz, there''s a distance of 20-30dB between them, because the hollow space is filled with glasswool or rockwool. (4) The factors of sound transmission loss,"Surface density" and "Total thickness" of partitions, can be analyzed with STC value in regression. The results of single panels are congruous with the mass law. The same as another two kinds of light-weight walls, but the other''s coefficient of determination is low. Considering the other factor of transmission loss to find out the important factor helping for sound insulation of partitions. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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