
10 log?
I need someone to explain to me what the math formula 10 log equates to in common SPL formulas. I can't get my head straight on it and most websites seem to lose me halfway through.
Decently simple would be nice.
An example calculation:
10 log 540 = ?
What's the magic behind 10 log! That's what I want to find out, so I may insert my own numbers and manipulate at will.
Thanks for any input.

10^a = b
<==>
a = 10log b
10^10log a = a
10log 10^a = a
(Not a good explanation perhaps, but a simple example on how log is connected to powers. They are kind of their others inverse)