Sound Intensity Simplicity

[novafan3000]

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I understand the pH scale very well but for some reason the dB system isnt clicking. Does anyone have an easy strategy for this. How would you know if its 2x louder vs 2x more intense? How do you relate distance in there since its not really off the log scale?

I have the formulas. I was just wondering if anyone had an intuitive approach and tips to just see that 40 to 50 db is an increase of intensity of x. THanks!

 

[stevvo111]

It goes like this, every 10 increase in decibles is 10 in intensity so...

from 10db to 20 is 10times intensity
20db to 30db is also 10 times in intensity

if you went from 10 to 30, it's a 100x intensity increase (think about it like this, so you went from 10-20 which is 10x, then from 20-30, so 10x10=100)

10-40 is 1000x

10 to 50 10,000x

and I=1/r^2 so exponential decay type thing. If you move .5 closer to stereo, intensity increases by (.5^2=.25 1/.25=4) 4. (I think, someone check me on this??!? please, but pretty sure it's right)