Sound transmission class
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Sound Transmission Class is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and
Sound Transmission Class Report Sample from NTi Audio showing Transmission Loss in the sixteen standard frequencies
A small gap in the wall can greatly reduce the STC rating. This wall did not receive a full perimeter seal.
Insulated glazing
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Insulating glass consists of two or more glass window panes separated by a space to reduce heat transfer across a part of the building envelope. A window with insulating glass is commonly known as dou
Sound transmission class
…and is weighted more to lower frequencies. The OITC value is typically used to rate, evaluate, and select exterior glazing assemblies. Examples include double- and triple-pane windows and laminated glass units, which reduce sound transmission from outdoor sources. Additional measures, such as window inserts…
EURO 68 wooden window profile with insulated glazing
A typical installation of insulated glass windows with uPVC frames
Hybrid spacers - examples (left to right): TGI, Swisspacer V, Thermix TX.N and Cromatech Ultra
VIG equipped window TIR imaging