Product Info - Acoustical

Sound waves, like heat, always follows the path of least resistance. If there are leaks in the acoustical insulation, then the wall assembly will not provide a good sound barrier. Poor fitting batt insulation can contribute to these sound leaks. Weathershield because of its dense fibers and ability to fill irregular cavities has excellent sound attenuation properties. The ability of an insulation for sound proofing is measured by the Sound Transmission Class (STC). Listed below are examples of various STC levels STC Value 30 Normal speech audible 35 Loud speech understood 40 Loud speech audible 45 Loud speech barely audible 50 Shouting barely audible 55 Shouting not audible 65 Very private Weathershield can be used to obtain ratings in excess of STC65. Typical Sound Transmission Curve