Análise da transmissão do ruído entre pavimentos de uma instalação sanitária: estudo de caso

Abstract

The number of Brazilians living in apartments has increased in recent decades. Between March and July 2020, with people more concentrated in their homes due to the COVID-19 pandemic scenario, noise was responsible for 87% of total complaints in multi-family residential condominiums. The noise emitted by hydro-sanitary installations, in addition to causing an unpleasant auditory sensation, can generate embarrassment between neighbors, as it causes a complete invasion of privacy. Therefore, we seek to identify the sound pressure levels emitted by sanitary equipment, which are transferred to bedrooms in neighboring housing units, in a multifamily residential condominium in the city of Guarapuava-PR. The methodology used the procedure described in NBR ISO 16032 to measure the quantities LAeq,nT and LASmax,nT of noise generated by sanitary installations on upper floors. Values were evaluated according to performance levels recommended by the performance standard NBR 15575-6. Results within the established minimums were obtained, with the exception of the LASmax,nT of the discharge from unit 207. The suggestion to attenuate the maximum sound pressure level is to insulate the sanitary pipes with an acoustic blanket, ensuring a sufficient acoustic performance to also minimize the level of equivalent sound pressure. With the results presented, it is concluded that this research contributes to the advancement of studies that seek to apply the acoustic comfort of Brazilian buildings.