| Finite element study on impact sound transmission through a floating floor |
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| 作者姓名： | MAO Jian-xi |
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| 作者单位： | School of |
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| 基金项目： | Funded by the Excellent Young Teacher Foundation of Henan Province under the grant No. [2005]461. |
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| 摘 要： | To understand the characteristics of impact-sound transmission through a floor is very helpful for developing sound attenuation strategies to acquire a high quality of dwellings. Sound transmission through a floating floor to the room underneath was modeled by finite-element method (FEM). The sound pressure levels calculated by the FEM model on a scale of 1:4 was compared with the measured values, which demonstrate good agreement, particularly for impact sound of a relatively low frequency. The sound pressure level in a receiving room is strongly affected by the structural characteristics of both the floor and the room. The sound pressure transmitted through a clamped floor is lower than through a simply supported floor because of the larger rigidity of the clamped floor that contributes to the attenuation mechanism of stiffness. Increase in the thickness of the fiber-glass damping layer in the floor improves sound insulation. A larger room has a larger capacity to dissipate the sound pressure and thus has a lower sound pressure level. An asymmetric configuration of room avails sound attenuation because it has weaker structural and acoustic coupling than a symmetric one.
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| 关 键 词： | 住宅 建筑声学 撞击声传播 有限元分析 |
| 文章编号： | 1671-8224（2007）03-0213-08 |
| 修稿时间： | 2006-11-13 |
Finite element study on impact sound transmission through a floating floor |
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| MAO Jian-xi.Finite element study on impact sound transmission through a floating floor[J].Journal of Chongqing University,2007,6(3):213-220. |
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| Authors: | MAO Jian-xi |
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| Abstract: | To understand the characteristics of impact-sound transmission through a floor is very helpful for developing sound attenuation strategies to acquire a high quality of dwellings. Sound transmission through a floating floor to the room underneath was modeled by finite-element method (FEM). The sound pressure levels calculated by the FEM model on a scale of 1:4 was compared with the measured values, which demonstrate good agreement, particularly for impact sound of a relatively low frequency. The sound pressure level in a receiving room is strongly affected by the structural characteristics of both the floor and the room. The sound pressure transmitted through a clamped floor is lower than through a simply supported floor because of the larger rigidity of the clamped floor that contributes to the attenuation mechanism of stiffness. Increase in the thickness of the fiber-glass damping layer in the floor improves sound insulation. A larger room has a larger capacity to dissipate the sound pressure and thus has a lower sound pressure level. An asymmetric configuration of room avails sound attenuation because it has weaker structural and acoustic coupling than a symmetric one. |
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| Keywords: | impact sound transmission floating floor finite element |
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