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WebSound Transmission Class (STC) is a measure for rating the performance of a wall system as a barrier to airborne sound transmission between adjacent closed spaces such as offices. A wall system with an STC < 35 is considered low performance, whereas one with … WebSTC is a numerical rating of how well a building partition attenuates airborne sound. In the U.S., it is widely used to rate interior partitions, ceilings/floors, doors, windows and … health and wellness companies in bangalore

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