Sensitivity of a microphone
The sensitivity
of a microphone is given by:
,
Where
is the output voltage and
is the acoustic pressure applied to the microphone.
Attention :
The ratio must be performed on two quantities of the same mathematical nature: two RMS values, or two maximum values, or two average values,...etc
The sensitivity of a microphone is generally expressed in
or
, but can also be expressed in decibels by calculating the relative sensitivity:
,
where
is the reference sensitivity. This value can differ between manufacturers (
,
,...).
