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Sound intensity level or acoustic intensity level is a logarithm
Logarithm

In mathematics, the logarithm of a number to a given base is the Power or exponent to which the base must be raised in order to produce the number....
ic measure of the sound intensity
Sound intensity

The sound intensity, I, is defined as the sound power Pac per unit area A. The usual context is the noise measurement of sound intensity in the air at a listener's location....
 (measured in W/m2), in comparison to the reference level of 10-12 W/m2.

The measure of a ratio of two sound intensities
Sound intensity

The sound intensity, I, is defined as the sound power Pac per unit area A. The usual context is the noise measurement of sound intensity in the air at a listener's location....
 is

where I1 and I0 are the intensities.

The sound intensity level is given the letter "LI" and is measured in "dB".






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Sound intensity level or acoustic intensity level is a logarithm
Logarithm

In mathematics, the logarithm of a number to a given base is the Power or exponent to which the base must be raised in order to produce the number....
ic measure of the sound intensity
Sound intensity

The sound intensity, I, is defined as the sound power Pac per unit area A. The usual context is the noise measurement of sound intensity in the air at a listener's location....
 (measured in W/m2), in comparison to the reference level of 10-12 W/m2.

The measure of a ratio of two sound intensities
Sound intensity

The sound intensity, I, is defined as the sound power Pac per unit area A. The usual context is the noise measurement of sound intensity in the air at a listener's location....
 is

where I1 and I0 are the intensities.

The sound intensity level is given the letter "LI" and is measured in "dB". dB is dimensionless.

If I0 is the standard reference sound intensity, where

(W = watt), then instead of "dB" we use "dB SIL". (SIL = sound intensity level).

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