Desempenho ao ruído de impacto de laje nervurada pré-fabricada com vigotas protendidas com pisos laminados de madeira (Floor impact noise performance of prefabricated prestressed joists and block slabs with wooden laminate floors)

This research aims to discuss and determine acoustic performance values for impact noise insulation (L’nT,w) for 39 floor system compositions that have different resilient materials and wooden laminate floor finishing. The methodology is organized according to ISO 16283-2, ISO 717-2 and NBR 15575-3 for classification. The results obtained demonstrate that the prefabricated ribbed slab with prestressed joists and ceramic slabs, as well as the slab and subfloor system do not meet the minimum requirements for acoustic insulation, comprising values of 91 and 84 dB, respectively. Among the other 37 samples, it is worth mentioning that wooden laminate floors with better abrasion resistance is more efficient concerning acoustic performance, comprising impact noise insulation values ranging from 60 to 62 dB, due to ist surface density. In the samples that use resilient materials, the performance values vary from 55 to 46 dB.

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