The Outdoor-Indoor Transmission Class (OITC) is a classification system used to measure and evaluate the sound insulation performance of building elements, specifically how sound from outdoor sources can transmit into indoor environments. This concept is crucial for understanding how buildings can be designed to mitigate environmental noise, ensuring that occupants are shielded from disruptive sounds from outside, such as traffic or construction. The OITC value is derived from various frequency bands, reflecting the overall effectiveness of a building's construction materials and design in providing acoustic comfort indoors.
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