> - If we are talking about dB in context of amplitude 6dB more means twice as much amplitude, 6dB less (or -6dB) means half the amplitude. > - If we are talki

> - If we are talking about dB in context of amplitude 6dB more means twice as much amplitude, 6dB less (or -6dB) means half the amplitude. > - If we are talking about dB in context of power 3dB more means twice as much power, 3dB less (or -3dB) means half the power. Yes, and there's a reason for this relationship -- the two decibel scales (amplitude and power) are often interchangeable, because (in many contexts including sound waves in air and electrical waves in conductors) power varies as the square of amplitude. So the same decibel ratio can be used to express both amplitude and power. https://en.wikipedia.org/wiki/Decibel https://en.wikipedia.org/wiki/Decibel