Plenum window insertion loss in the presence of a line source—A scale model study
- 1 March 2013
- journal article
- research article
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 133 (3), 1458-1467
- https://doi.org/10.1121/1.4788996
Abstract
The acoustical insertion losses of plenum windows installed on a building facade in the presence of a non-parallel line source are studied by using a 1:4 scaled down model in a semi-anechoic chamber in the present investigation. Two types of insertion losses, weighted by the normalized traffic noise spectrum (from the 100 Hz to 5000 Hz one-third octave bands), are defined with different references. The first one is for the case where the orientation of the building facade relative to the line source is fixed. The reference case is the opened window having the same orientation angle as the plenum window. The maximum and minimum insertion losses under this condition across the orientations tested are found to be around 14 dB and 5 dB, respectively. The other is the opposite situation where such orientation is allowed to change because of practical purposes and the reference for this condition is the opened window with its width span parallel to the line source. The corresponding maximum and minimum insertion losses are found to be around 18 dB and 8 dB, respectively. There are evidences showing that the lower order plenum acoustic modes are responsible for the relatively high low frequency insertion loss.Keywords
This publication has 11 references indexed in Scilit:
- An Acoustic Window System with Optimum Ventilation and Daylighting PerformanceNoise & Vibration Worldwide, 2006
- Noise screening effects of balconies on a building facadeThe Journal of the Acoustical Society of America, 2005
- Feasibility of applying micro-perforated absorbers in acoustic window systemsApplied Acoustics, 2005
- The predicted barrier effects in the proximity of tall buildingsThe Journal of the Acoustical Society of America, 2003
- Active control of double-glazed windowsPart I: Feedforward controlApplied Acoustics, 2003
- Noise control strategies for naturally ventilated buildingsJournal of Affective Disorders, 2002
- Sound transmission through single, double and triple glazing. Experimental evaluationApplied Acoustics, 2001
- European methodology for testing the airborne sound insulation characteristics of noise barriers in situ: Experimental verification and comparison with laboratory dataThe Journal of the Acoustical Society of America, 2000
- Traffic noise and the open windowThe Journal of the Acoustical Society of America, 1982
- The sound insulation of partially open double glazingApplied Acoustics, 1973