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Which type of product typically gets higher grades according to the International Standard for Classification of Sound Absorbers?

      More than 90% of all ceiling panels installed in North America are either fiberglass or mineral fiber with mineral fiber being the more widely used of the two. However, fiberglass is a much more effective sound absorber than is mineral fiber. As such, most every fiberglass ceiling panel is a “Class A or B” sound absorber while most every mineral fiber ceiling panel is a “Class C or D” sound absorber.
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