Outdoor-Indoor Transmission Class (OITC) is a standard used for indicating the rate of transmission of sound between outdoor and indoor spaces in a structure. It is based on the ASTM E-1332 Standard Classification for the Determination of Outdoor-Indoor Transmission Class. An alternative similar standard for determining the rate of acoustic isolation of a separation between spaces is STC. While STC is based on a noise spectrum targeting speech sounds, OITC utilizes a source noise spectrum that considers frequencies down to 80 Hz (Aircraft/Rail/Truck traffic) and is weighted more to lower frequencies.
OUTDOOR CHANNEL LAUNCHES 'CONSERVATION TOUR OF DUTY' AT WEST VIRGINIA'S CELEBRATION OF NATIONAL HUNTING AND FISHING DAYS
Sep 25, 2010; ROANOKE, W. Va., Sept. 24 -- The West Virginia Department of Commerce's Workforce West Virginia issued the following news...