SR interactions between auditory noise and tactile signals.

<p>(Left column) normalized tactile threshold changes with the noise level in three subjects. (Right column, top) normalized tactile thresholds of sixteen subjects when the 3D sound level was fixed at 69 dBSPL. (Right column, middle) normalized tactile thresholds of sixteen subjects when the noise level was fixed at 69 dBSPL. (Right column, bottom) Group average results for three conditions: baseline, 3D sound and noise. The average group threshold decreased significantly in the presence of noise (p<0.001) and no significant change was found for the 3D-like sound (p = 0.72). In all the graphs the no-noise condition is taken as baseline; the black dots indicate p-values (right y-axis) and the broken line represents the 5% significance level. Error bars correspond to one standard error.