doubling is +3dB
Silly math realization: the reason why doubling signal level is almost +6 dB is the same as the reason why 1 kibibyte is almost 1000 bytes. +60 dB = +6 B = 10^6 times the power = 10^3 times the level = 1000 ~= 1024 = 2^10 = 10 doublings, ~60 dB/10 = 6 dB each.
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Doubling power is 3 dB. Doubling signal level quadruples power and is 6 dB.
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Yes. I figured this out pretty quick. I think it's because when I was 15, we had an entire math lecture (or maybe two) dedicated to rewriting exponentials into logs, and vice-versa. Seemed entirely pointless at the time.
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