OUTDOOR-INDOOR TRANSMISSION CLASS

'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
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. [1]

Contents

Links:

Links:

#ASTM International: [2]
#Viraconsulting Glossary: [3]