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E. Bajraktari, J. Lechleitner, A. Mahdavi:
"The Sound Insulation of Double Facades with Openings for Natural Ventilation";
Building Acoustics, 22 (2015), 3+4; 163 - 176.

Natural ventilation represents a potentially sustainable scheme for the provision of good indoor
air quality and free cooling in buildings. Noise pollution is an impediment in this case, as
buildings under noise exposure cannot effectively deploy the natural (window) ventilation option.
The present contribution focuses on a double-leaf facade solution, which offers sufficient sound
insulation while facilitating natural ventilation. The impact of various variables of such a system
(e.g., the size of the opening, location of the openings, the relative displacement of the openings
in the two layers, the cavity sound absorption) were examined via parametric laboratory sound
transmission measurements using an experimental modular double-leaf wall. An empiricallybased
equation and a simple analytical one were developed for the prediction of the sound
insulation of double-leaf facades with openings for natural ventilation. The results of these
computational estimations are compared with the measurements results to discuss the potential
and limitations of their predictive performance.

none - see english abstract

http://dx.doi.org/10.1260/1351-010X.22.3-4.163

http://bua.sagepub.com/content/22/3-4/163.full.pdf+html

Project Head Ardeshir Mahdavi:
Innovative Fassaden für natürliche Raumlüftung und optimierten Schallschutz ¿ LEIse_WAND