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Optimization of impact sound insulation of wooden beam ceilings in Wilhelminian style houses, Part 2: Ceiling construction and flanking transmission The research deals with the influence of various parameters in the ceiling structure, such as cavity damping, screed thickness, impact sound insulation, fill and suspended ceilings, on the standard impact sound level of typical Wilhelminian style wooden beam ceilings. The measurements show that a thicker screed, softer impact sound insulation and a heavier fill significantly improve the impact sound level. Binding the fill with polyurethane instead of cement shows a significant improvement in the frequency range from 100 to 500 Hz. While cavity damping with mineral wool only contributes to a limited reduction in the standard impact sound level, decoupling the fill on an elastic intermediate layer delivers significant improvements. The measurements also show that the thickness of the paneling and the type of hangers in suspended ceilings have a significant impact on impact sound insulation. The investigations into flank impact sound transmission make it clear that flank transmission must be taken into account when planning higher requirement levels. Especially in the frequency range between 250 Hz and 800 Hz, the sound transmission of flanking components can play a significant role in the overall transmission. [ABSTRACT FROM AUTHOR]

Impact sound insulation in renovated Wilhelminian‐style buildings – Part 1: Problem statement and renovation options Gassner & Partner Baumanagement GmbH, in collaboration with TU Wien, conducted a study to optimize impact sound insulation in Wilhelminian‐style building renovations. Historical renovations lacked specific sound standards, causing resident disruption. The research varied parameters like screed thickness, impact sound insulation, aggregate, and suspended subceilings to assess impact sound protection per ÖNORM B 8115‐5. Initial analysis of three properties showed reasonable protection in existing wooden beam ceilings. Suspended subceilings significantly improved sound levels, with the spectrum adaptation value CI,50‐2500 crucial for higher classification. Measurements during multiple renovations demonstrated that these measures are reproducible and can exceed new construction standards, significantly enhancing living comfort in historic buildings. [ABSTRACT FROM AUTHOR]