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How do you convert a power ratio to decibels?

1 Answer

Converting a power ratio to decibels involves using a logarithmic function. The formula to convert a power ratio to decibels is as follows:

Decibels (dB)
=
10
×
log

10
(
Power Ratio
)
Decibels (dB)=10×log
10
    ​

(Power Ratio)

Here, the power ratio represents the ratio of two power values, and the result in decibels will indicate the relative difference in power between them. Decibels are commonly used in various fields to express power levels, gains, losses, and other quantities in a more manageable and meaningful way.

Let's go through an example:

Suppose you have a power ratio of 100. To convert it to decibels:

Decibels (dB)
=
10
×
log

10
(
100
)
Decibels (dB)=10×log
10
    ​

(100)

Decibels (dB)
=
10
×
2
Decibels (dB)=10×2

Decibels (dB)
=
20
Decibels (dB)=20

So, a power ratio of 100 is equivalent to 20 decibels (dB).
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