Originally Posted by J-hop
Actually no. Doubling POWER is 3dB. Doubling amplitude is 6dB. NEITHER relates to a doubling of perceived volume, that is a much more complex calculation as you have to deal with weighting. Two signals of equal amplitude perfectly constructively interfering should equal twice the amplitude.
a doubling of POWER (or energy) is the same as the doubling of SOURCE (for instance....2 horns as opposed to 1, 4 horns as opposed to 2). doubling the source is NOT the same as double the amplitude (gain).
nowhere in my response did I state that perceived volume doubled, merely that perceived volume changes in relation to distance and angle to the source. 10db is a perceived doubling of volume. i do audio for a living.
its a 3db gain. yay for logs