Dipole mode visibility as a function of the modulus of the reflection coefficient of the lower boundary of the g-mode cavity for our three sets of stellar parameters. For each set, we show the visibility for the three nominal values of the period spacing of the parameters sets (colors) and the modulus of the reflection coefficient of the upper boundary of the p-mode cavity (line styles). The gray horizontal lines correspond to the visibility of the dipole mode when R_g = 0 (Eq. (52)). Small deviations from the value predicted by Eq. (52) can be induced by the multiplication of the normalized power spectrum with the Gaussian envelope (see Sect. 4.2). For an explanation why the visibility is not always equal to one when |R_g| = 1, see Appendix D.