Trinity Windows: Product Verification in the Acoustics Chamber

Challenge

Trinity Facades was launching a new glazing product to market that must comply with Building Regulations. Testing was carried out in accordance with ISO 10140:2021 and ISO 717-1:2013.

Solution

This acoustic project was delivered using the transmission loss suite to determine the airborne sound transmission loss and the weighted sound reduction index (Rw) of a sliding door and a fixed window system. The transmission loss suite consists of two ‘’uncoupled’’ reverberation rooms with a standard 10m2 test aperture. It is a highly reverberant acoustic environment with very low absorption and minimal flanking paths, enabling accurate testing of the glazing system. In the source room, a diffuse sound field was generated by omni-directional sound sources. The spatially averaged sound pressure levels were measured in the source and receiving rooms through Brüel & Kjær diffuse field microphones and a multi-channel LAN-XI data acquisition system. The equivalent sound absorption area in the receiving room was calculated from reverberation time measurements. Three individual loudspeaker positions were used to excite the sound field in the receiving room. From the sound pressure level difference between the rooms, the sound reduction index was evaluated by taking into account the equivalent absorption area of the receiving room and the size of the test sample. Testing and reports were delivered in accordance with ISO 10140:2021 and ISO 717-1: 2013.