2019-04-102019-04-102018-12GONÇALVES, Pedro Henrique; CARVALHO, Michele Tereza Marques. Isolamento acústico de paredes de um dormitório por modelo simplificado. Revista Eletrônica de Engenharia Civil, Goiânia, v. 14, n. 2, p. 148-157, jul./dez. 2018. Disponível em: <https://www.revistas.ufg.br/reec/article/view/49951/pdf>.e- 1279-0612http://repositorio.bc.ufg.br/handle/ri/17405After a long period of discussions, the Performance Standard - NBR 15.575 (ABNT,2013) entered into force, instituting minimum performance levels throughout the life of a building. Regarding the acoustic performance, the standard establishes that the housing construction must present adequate acoustic insulation of the external fences and adequate acoustic insulation between common and private areas. In order for the required acoustic performance criteria to be met, with the finished building, an isolation study is required at the design stage and subsequent proof of this performance when the building is completed. This paper aimed to determine the acoustic insulation of the walls of a dormitory in a housing project that will be located in Anápolis / GO, predicting its composition by masonry of ceramic block. In order to do so, the calculation method defined in Standard ISO 12.354-1 (EN, 2000) was used to determine the weighted sound reduction indices and the Standardized Weighted Level Difference of the components and construction systems of the walls. In addition, the sound attenuators of four DATec's construction systems were recalculated. The results showed that, especially the internal sealing walls, did not reach the minimum acoustic performance predicted in the standard. It has further been found that certain components considerably decrease the acoustic insulation of the sealing walls. It was also verified the importance of evaluating the acoustic performance of the buildings in the design stage.porAcesso AbertoDesempenho acústicoIsolamento sonoroSistema de vedaçãoProjetoPrevisãoPerfomanceAcoustic insulationSealing systemDesignPredictionArtigo10.5216/reec.v14i2.49951