Noise Reduction Coefficient (NRC) is the average of the absorption coefficients at 250, 500, 1000, and 2000 Hz.
- It essentially measures how well something absorbs sound, mostly in the range of normal speech frequencies.
- NRC usually ranges from 0 to 1.
- A reasonable rule of thumb is that the NRC of a product is the percentage of sound a product will absorb.
Below are the indicative NRC values for each QuickStyle Panel.