ACOUSTIC PERFORMANCE OF ALUMINUM WINDOW FRAMES IN THE CONTEXT OF NBR 15575: SYSTEMIC INNOVATION AND A CASE STUDY IN A CLASS III NOISE ZONE

• DOI: https://doi.org/10.22533/at.ed.1317642627033

• Palavras-chave: acoustic performance; aluminum window and door frames; NBR 15575; sound insulation; facades.

• Keywords: acoustic performance; aluminum window and door frames; NBR 15575; sound insulation; facades.

• Abstract:

  The intensification of urbanization in Brazilian cities has raised environmental noise levels, making the acoustic performance of facades an essential requirement in residential buildings. In this context, window and door frames play a decisive role, especially in light of the requirements established by ABNT NBR 15575. This study analyzes recent developments in the acoustic performance of aluminum window and door frames, highlighting the influence of standardization on technological innovation in the sector and presenting a case study applied to a residential development located in an area classified as Noise Class III. The research adopted a qualitative-quantitative approach, conducting a field test to determine the D₂m,nT,windex of the facade. The technical solution developed combined 25 mm profiles with optimized geometry, multiple sealing systems, pressure-controlled locking, and laminated glass with PVB interlayers. The result obtained was 37 dB, meeting regulatory criteria and exceeding typical values reported for systems of the same dimensional range. It is concluded that acoustic performance is associated with the integrated design of the system, and not exclusively with increased mass, highlighting the technical and economic feasibility of rationalized solutions.