6
Background noise
nIf the background noise is superposed to the impulse response, the previous method already takes care of it,
and the MTF values are
measured correctly
nHowever, in some cases, it is advisable to perform a
noise-free measurement of the
IR, and then insert the effect of the noise with the following expression:
nThis makes it possible to
measure the impulse response in the laboratory, and then to perform just the noise measurement with the car running over the road