Flooring Sound Test

The data and assemblies shown are for informational purposes only and are not represented as being all inclusive correct complete or up to date.

Flooring sound test.

Iic impact insulation class iic measures a floor ceiling assembly s resistance to the transmission of structure borne or impact noise. Sound transmission class stc is an integer rating of how well a building partition attenuates airborne sound in the usa it is widely used to rate interior partitions ceilings and floors doors windows and exterior wall configurations see astm international classification e413 and e90. The higher the number the better the sound isolation. The third covers room to room transmission more appropriate for walls.

It is important to understand that iic and stc tests are not for individual components of a flooring assembly but for the whole floor ceiling structure from the surface of the floor covering material in the upper unit all the way to the ceiling in the unit below. Some test reports and the resulting acoustical performance may be based on field tests or lab tests with small size samples please check the test report for further details. The impact sound insulation properties of a floor ceiling structure including the flooring are usually tested by measuring the transmitted sound in a room below while a standard hammer machine bangs on the floor above. When evaluating flooring underlayment sound deadening and acoustical ratings are one of the things homeowners or hoa considers.

Sound absorption of floor coverings may be measured on two of those scales. It all begins with how sound is generated and the medium it transfers through. The results of the test are rated in terms of the impact insulation class iic.