20
Conclusions
nThe hardware and software developed allows for quick and
reliable measurement of STI in cars.
nThe background noise can be present during
the actual measurement: however, it
is possible to add its effect later, in
two different ways:
nMixing a noise recording over the re-recorded
MLS signal, prior of IR deconvolution
(yet to be assessed)
nCorrecting the MTF values with the
theoretical relationship, knowing the
levels of the signal and of the noise (ideal method when only the noise spectral values are known, and no recording is
available)
nThe methodology developed, however, allows also for the creation of sound samples, containing speech (convolved with the noiseless IR) and background noise: these sound
samples can be employed for listening tests.
