E Sousa, AN and Gibbs, B 
ORCID: 0000-0002-5146-8215
(2003)
Low frequency impact sound transmission in dwellings.
.
|
Text
433731.pdf - Unspecified Download (35MB) | Preview |
Abstract
The present paper reports on an ongoing study that has been sponsored by the Portuguese Foundation for Science and Technology (FCT). This study aims to characterise impact sound transmission between dwellings in the frequency range 40 - 200 Hz. This study is justified by the fact that low frequency noise in buildings is an increasing problem. In general, building elements such as floors (and walls) fail to comply with performance standards at low frequencies. This problem is exacerbated by the modal behaviour of small, often rectangular rooms, which results in large spatial and spectral fluctuations in sound bvel (and sound level difference). These fluctuations are not taken into account in the present standards and a measurement method has yet to be confirmed for very low frequency sound transmission. Therefore, analytical and numerical methods are used in parametric studies that aim to identify the factors that control low frequency impact sound transmission. A modal analysis is used to evaluate the vibration field of a floor, subjected to a point impact force, and then the sound field in the reception room. The advantage of the method is the computational time, which is shorter than the required by other methods, such as the Finite Element method. The method has been experimentally validated and used to perform a parametric analysis of the effect of type of excitation, the location of excitation, type of floor, edge conditions, room dimensions and absorption.
| Item Type: | Conference or Workshop Item (Unspecified) |
|---|---|
| Depositing User: | Symplectic Admin |
| Date Deposited: | 20 Oct 2023 12:41 |
| Last Modified: | 20 Oct 2023 12:59 |
| DOI: | 10.17638/03174722 |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3174722 |
Dimensions
Dimensions
