The amount of sound MLV reduces depends on its thickness. Higher-density materials have a higher STC rating than thinner light weight alternatives.
Each of our MLV products has an STC rating that describes how much sound it can reduce.
The STC rating comes from a calculation that compares decibel levels inside the room with the decibel level outside of the room.
We calculate the STC rating by measuring sound at different frequencies inside and outside of the room where it's generated. We subtract the decibel level outside from the decibel level inside at each frequency, then add all of the differences together and divide by the number of frequency selections we recorded. This final product is the STC rating.