GB/T 39526-2020

This standard specifies the classification levels and laboratory measurement methods for evaluating the airborne sound insulation performance of curtain walls. It is applied in the construction industry for testing and rating the acoustic performance of building curtain wall systems, including glass, metal, and stone panel types, during product development, quality certification, or acceptance inspection. The standard ensures consistent evaluation of sound insulation across different curtain wall designs, aiding architects and engineers in selecting appropriate systems for noise-sensitive environments like offices, hotels, or residential buildings near traffic.