Effects of sound incidence angle on the effectiveness of noise reduction measures applied to acoustic windows

Leung, Mors; Tang, S. K.; Fung, M. L.

Abstract

With more residential buildings being built close to road network systems in Hong Kong, there is an increasing need to find method to combat excessive traffic noise exposure in residentials unit. Several measures have been employed in various places, for example, vertical barrier along road with heavy traffic, acoustic balcony and acoustic windows on the façade of the residential unit. Recent addition to effective methods of reducing noise into home are micro perforated panels, and 'promute' material. These materials have various characteristic in noise reduction and can help to alleviate noise level. The orientation of the noise source with respect to the window is also an important factor to gauge whether an approach is worth using in different window setup. We tested different combination of noise reduction method on window setup that are commonly found in Hong Kong with different angle of incidence of noise source to simulate the noise from different sections of road traffic. We find that a sliding panel itself have an insertion loss of 3.5 to 7.9 dBA among different loudspeaker positions. A further 0.6-1.6 dBA is provided with plenum absorption, and the addition of MPP gives another 0.5-1.4 dBA improvement.

Citation

Leung, M., Tang, S. K., & Fung, M. L. (2019, June). Effects of sound incidence angle on the effectiveness of noise reduction measures applied to acoustic windows. Presented at inter-noise 2019: Noise Control for a Better Environment, Madrid, Spain

• Presentation Conference Type: Conference Paper (published)
• Conference Name: inter-noise 2019: Noise Control for a Better Environment
• Start Date: Jun 16, 2019
• End Date: Jun 19, 2019
• Acceptance Date: Dec 27, 2018
• Publication Date: 2019
• Deposit Date: Jul 11, 2022
• Book Title: Proceedings of inter-noise 2019 : the 48th International Congress and Exhibition on Noise Control Engineering
• ISBN: 9788487985317
• Public URL: https://hull-repository.worktribe.com/output/4015720
• Publisher URL: http://www.sea-acustica.es/fileadmin/INTERNOISE_2019/Fchrs/Proceedings/1899.pdf
• Related Public URLs: https://i-ince.org/congresses.php