Nrc-Irc flanking sound transmission facility
Keywords:Architectural acoustics, Bearings (structural), Computer control systems, Floors, Sound insulation, Walls (structural partitions), Fixed surfaces, Flanking sounds, National Research Council, Noise source, Research facilities, Robot movements, Single specimen, Sound insulation performance, Vibration transmission
AbstractResearchers from the National Research Council designed and built a flanking facility to investigate the way flanking paths affected the sound insulation performance of building systems. The facility had a number of specific features to help the researchers conduct the investigations. The research facility had 8 rooms or 8 walls, 4 floors, and 6 junctions, enabling evaluation flanking of bearing and non-bearing wall and floor junctions, along with wall paths with a single specimen. Fixed surfaces were large and isolated from one another using resilient mountings to ensure that the facility did not contribute to vibration transmission. Each room had a volume that differed by around 10% from adjacent rooms to avoid modal matching and follow the recommendations of ISO 140 standard. The entire facility was also run by a computer system that controlled noise sources, robot movements, and signal capture.
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