Product descriptions typically include a “Noise Reduction Coefficient (NRC) rating” between 0 and 1. The higher the number, the greater the absorption. While this number may seem important, the truth is…it’s pretty much worthless for recording studios. And here’s why: The test to determine this number only measures absorption at 4 frequencies: 2000 Hz 1000 Hz 500 Hz 250 Hz Which means […]