23
Results
nThe first results coming from the listening
tests show that some
light difference between the three cars can be systematically perceived (some subjects
reliably identify each
of the three cars, also after random shuffling the sound samples);
nNevertheless, an ANOVA performed over the
subjective responses,
shows no significant difference among the three cars;
nThe subjects employed for the tests revealed
to be unsatisfactorily
trained to listen to background noise;
nThe scores obtained by the sound systems
(IPA) are much worst
in presence of the reproduced background noise than in absence of it;