KEY POINTS Loudness is Perceptual:  Loudness isn't just about volume; it’s a mix of physical sound pressure and how your brain interprets factors like pitch and duration. The Decibel (dB):  We use decibels to measure sound intensity. Because the scale is logarithmic, a 10 dB  increase usually sounds about twice as loud to the human ear. LUFS vs. Raw Volume:  LUFS (Loudness Units Full Scale) is the industry standard because it measures how loud a song feels , whereas older met