The Ontario Building Code | Determination of Sound Transmission Class Ratings
220.127.116.11. Determination of Sound Transmission Class Ratings
(1) Sound transmission class ratings shall be determined in accordance with ASTM E413, "Classification for Rating Sound insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation", using results from measurements in accordance with,
(a) ASTM E90, "Laboratory Measurement of Airborne Sound Transmission Loss of building Partitions and Elements", or
(b) ASTM E336, "Measurement of Airborne Sound Attenuation Between Rooms in Buildings".
9.11.2. Required Sound Control Locations (Airborne Sound)