Ratio of the characteristic radial damping lengthscale of the wave energy as given in Eq. (A.1)to the radius for both 1 M_⊙ models considered in Sect. 4.1. It is plotted as a function of the radius normalized by its value at the top of the radiative zone, r_t, for a degree l = 1 and an intrinsic wave frequency rad s^-1. The vertical dotted lines localizes the hydrogen-burning shell in both models. The profile assumed in Appendix A.2 is represented by the red dashed line for the subgiant model.