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Outdoor-indoor Transmission Class




An Outdoor-Indoor Transmission Class (OITC) is a single-number rating, defined in ASTM International E 1332, used to rate the effectiveness of a building Partition in isolating transportation Noise (lower-frequency ).

"This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall loudness of ground and air transportation noise." {Link without Title}


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