Abstract
Noise is a nuisance in the built environment, and to avoid undesirable transmission of sound and vibration within a building, its vibro-acoustic performance must be addressed in the design phase. For heavy structures, a reliable assessment of the sound pressure levels can be made by statistical energy analysis—especially at high frequencies. However, for lightweight buildings a numerical approach, e.g. the finite-element method, must be applied. A problem in this regard is the computational complexity. Even at low frequencies, many degrees of freedom are required in a model accounting for all possible paths for transmission of sound in a building—in particular when finite elements are employed for the air. This paper examines whether a rigorous model of the acoustic field in each room is necessary in order to obtain accurate estimates of the sound pressure, or if a simpler approach may be adopted. Five different cases are compared: A model that only includes the structure, a model with semi-infinite elements to account for radiation from the structure into the air, a model introducing finite elements for the acoustic field, a model with dissipation of sound inside the room, and finally a model with sound absorption on the surfaces of walls, floors and ceilings.
Original language | English |
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Title of host publication | Proceedings of the Internoise 2012/ASME NCAD meeting |
Number of pages | 12 |
Place of Publication | New York, USA |
Publisher | Institute of Noise Control Engineering of the USA, Inc. |
Publication date | 2012 |
Publication status | Published - 2012 |
Event | Inter-Noise 12: Inter-Noise Congress in the USA - New York, United States Duration: 19 Aug 2012 → 22 Aug 2012 |
Conference
Conference | Inter-Noise 12 |
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Country/Territory | United States |
City | New York |
Period | 19/08/2012 → 22/08/2012 |
Keywords
- Finite-Element Analysis
- Sound Transmission
- Lightweight Buildings