Some previous studies showed that mechanical variabilities could have a critical impact on structural and acoustical characteristics of an industrial object. The aim of this study was to know if these variabilities could have an influence on the perception of sounds and how that influence could be measured. To evaluate the influence of relevant dispersions with a relative low number of measurements, experimental designs were used. The underlying goal was to determine whether this approach, already improved for the understanding of vibro-acoustic data [2], could be consistent with the analysis of perceptive data and could generate a reliable tool for perceptive tests.