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Insertion loss of asymmetrical balconies on a building facąde

Tang, S. K.; Ho, C. Y.; Chan, W. Y.

Authors

S. K. Tang

C. Y. Ho

W. Y. Chan



Abstract

The acoustical insertion loss of asymmetrical balconies on high-rise buildings was studied experimentally using a 1:3 scaled down model in the present study. Four balcony forms featured by the presence of a full-height side-wall were included. A linear loudspeaker array was adopted as the sound source. The effects of source orientation and balcony elevation angle on the insertion loss and its spectral variation were examined. The position of the full-height side-wall relative to the sound source significantly affects the balcony insertion loss. It is observed that the maximum traffic noise amplification and attenuation are both ∼6 dBA. Results also suggest that the balustrade has no effect on the insertion loss spectral variation pattern, though the insertion loss magnitude could be much reduced without it in the presence of a short side-wall. This short side-wall determines the insertion loss spectral variation pattern. Significant sound amplification is found at frequencies of the odd order transverse modes, the longitudinal modes, and their coupled modes regardless of balcony form and elevation angle. It is also found that the major acoustic mode interactions are basically independent of source orientation for balconies without the short side-wall.

Citation

Tang, S. K., Ho, C. Y., & Chan, W. Y. (2019). Insertion loss of asymmetrical balconies on a building facąde. The Journal of the Acoustical Society of America, 146(3), 1580-1594. https://doi.org/10.1121/1.5125135

Journal Article Type Article
Acceptance Date Aug 18, 2019
Online Publication Date Sep 9, 2019
Publication Date 2019-09
Deposit Date Jul 11, 2022
Journal Journal of the Acoustical Society of America
Print ISSN 0001-4966
Publisher Acoustical Society of America
Peer Reviewed Peer Reviewed
Volume 146
Issue 3
Pages 1580-1594
DOI https://doi.org/10.1121/1.5125135
Public URL https://hull-repository.worktribe.com/output/4015702