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Hanna Autio, Nikolaos-Georgios Vardaxis and Delphine Bard Hagberg
Ray tracing is a frequently used method for acoustic simulations, valued for its calculation speed and ease of use. Although it is fast, there are no fully ray tracing-based real-time simulation methods or engines. Under real-time restrictions, ray traci...
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Erik Nilsson, Sylvain Ménard, Delphine Bard Hagberg and Nikolaos-Georgios Vardaxis
Sound reduction is complex to estimate for acoustical treatments on ventilation ducts through walls. Various acoustical treatments are available for ventilation ducts, including internal lining (absorption along the inner perimeter), external lagging (ex...
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Mohamad Bader Eddin, Sylvain Ménard, Delphine Bard Hagberg, Jean-Luc Kouyoumji and Nikolaos-Georgios Vardaxis
The artificial neural networks approach is applied to estimate the acoustic performance for airborne and impact sound insulation curves of different lightweight wooden floors. The prediction model is developed based on 252 standardized laboratory measure...
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Erik Nilsson, Nikolaos-Georgios Vardaxis, Sylvain Ménard and Delphine Bard Hagberg
Ventilation ducts can have a negative effect on the sound reduction index between two rooms if they pass through the dividing structure without treatments. The overall sound reduction of a ventilation duct is dependent on several factors including the tr...
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Emma Arvidsson, Erling Nilsson, Delphine Bard Hagberg and Ola J. I. Karlsson
In ordinary public rooms absorbent ceilings are normally used. However, reflective material such as diffusers can also be useful to improve the acoustic performance for this type of environment. In this study, different combinations of absorbers and diff...
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Emma Arvidsson, Erling Nilsson, Delphine Bard Hagberg and Ola J. I. Karlsson
Several room acoustic parameters have to be considered in ordinary public rooms, such as offices and classrooms, in order to present the actual conditions, thus increasing demands on the acoustic treatment. The most common acoustical treatment in ordinar...
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