ITU-R 468 noise weighting

ITU-R 468 noise weighting is a way to measure or calculate the amount of noise in an audio system. It is often used for broadcast audio systems. It looks at both the loudness of the noise and the frequency or pitch of the noise. So it measures how loud and what type of sound there is. Just like you can use a ruler to measure how tall someone is, ITU-R 468 noise weighting is like a ruler to measure the amount of noise in an audio system!