Flow chart of the experimental session, depicting all activities. The solid circular lines mark the psychophysical tasks (and the questionnaires attached to them), the solid rectangular lines mark the other activities (consisting of only questionnaires and ratings), the dotted parallelograms mark the three rest periods, and the dashed diamonds mark the boom conditions. For pseudo-randomisation purposes, the psychophysical tasks were organised in three groups, delimited by the three dashed opening square brackets, and within these groups the tasks were organised by boom condition. The grouping constrained the pseudo-randomised orders that could be generated. The room condition(s) in which each activity was done are displayed in italics.