![]() ![]() ![]() 3 Conversely, fiberglass’ STC is much lower. Mineral wool has an STC rating roughly ranging between 45 and 52, which is the highest among insulation materials. Regarding each material’s soundproofing ability, most experts agree that mineral wool (also referred to as stone wool) is superior to fiberglass because of its greater density-and its higher STC rating as a result. Fiberglass Insulation: How The Soundproofing Materials Compare If you’re looking for soundproofing insulation that will be used for exterior walls, you’ll likely want to ensure it meets R-value recommendations for your climate. R-values – Unlike the other two ratings, R-values refer to a material’s temperature insulation properties.NRC ratings – Whereas STC ratings are used to demonstrate how much sound is blocked, noise reduction coefficients (NRCs) describe how much sound will be absorbed, which relates to minimizing acoustic effects like echoing.A material’s impact insulation class (IIC) rating will inform you of how effective the material is at stopping this type of noise. IIC ratings – Not all sound is transmitted via the air some is due to the vibrations caused by impacts.60+ – Considered the minimum for true soundproofing.40 – Loud speech (heard but not understood).For further reference, the associated sounds will still generally be heard at the following STC values: 2 Two sheets of ½” drywall separated by studs-or a standard interior wall-provides an STC of roughly 33, which may struggle to mute a normal conversation in another room. ![]() STC rating – A material’s sound transmission class (STC) rating informs you of how much noise it can effectively block.fiberglass, it’s important to explain some of the ways these sound insulation products are rated: ![]()
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