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Decibel Calculator for Audio (voltage)

small calculatorIf you don’t like formulas then you definitely won’t like the formula for calculating voltage ratios expressed in decibels.

So, use the following calculators to get a handle on the decibels with different input and outlet levels.

These calculators also show you the theoretical values for resistors to make your own inline audio attenuator, and a calculator to show you the actual dB attenuation with any two real world resistors.

Note: the calculator is best viewed in landscape mode on phones and small screens

Decibel calculator
Circuit for simple audio attenuator – the value of the resistors are calculated above

For a better understanding of what all this means, read the articles on Understanding Decibels  Part 1 and Part 2.

For those who need to know, the basic formulas used for these calculators are :

\Large{dB = 20 Log_{10}\left(\frac{output\, level}{input\, level}\right)}

and

\large{Attenuation\ Ratio=\frac{\left(Resistor\,1+Resistor\,2\right)}{Resistor\,1}}

 

Further reading

Please Note: Due to other commitments I'm currently unable to spare the time required to answer further questions in the way I'd like. Hopefully this is a temporary situation. I'm sorry for this inconvenience.
Geoff

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