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ROCHA, Raquel Rossatto. Analysis and characterization of acoustical solutions to mitigate the noise from hydrosanitary systems in buildings. 2018. 110 p. (Master) Polytechnic, University of São Paulo, São Paulo, 2018. Excessive noise is considered a public health problem due to its impact on human health. In residential buildings, the noises emitted by hydrosanitary are the source of most complaints from users. In this context, we highlight the need for acoustic control in residential buildings, in the specific case of this work, for the control of hydrosanitary systems noise in building. The standard NBR 15575: 2013 establishes parameters for the noises generated by hydrosanitary systems do not produce highs sound pressure levels inside the bedroom. When these levels are high, they cause a nasty hearing perception and can generate constraints between neighbors, due to the lack of privacy. The goal of this dissertation is to evaluate and analyze the results of possible acoustic solutions to mitigate the sound pressure levels generated by hydrosanitary systems, due to the triggering of discharge activation of toilets and tap opening. For this, measurements of sound pressure levels as ISO 16032: 2004 adapted to laboratory in acoustic testing environment hydrosanitary Instituto de Pesquisas Tecnológicas (IPT) to nine samples. Evaluated and compared the technical results found through the variable, LZeq,nT, LAeq,nT e LASmax,nT, for each sample as the tube enveloped and apparent tube. The results for the samples analysed are satisfactory, since most samples reduce more than 20 dB for noise generated due to the discharge activation and 10 dB for noise from the tap opening. Through the cost-benefit analysis, it was found that the sample C has the best relation between estimated samples.

Análise e caracterização de soluções acústicas para mitigar os ruídos oriundos de instalações hidrossanitárias prediais.