The H abundance profile (upper panels) and the squared Brunt-Väisälä frequencies (full lines) and Lamb frequencies (dashed lines) (lower panels) for M_⋆ = 1.30 M_⊙ (left), M_⋆ = 1.70 M_⊙ (center), and M_⋆ = 2.10 M_⊙ (right). The four different evolutionary states displayed are clearly distinguishable from the different central abundances of H (X_H = 0.7,0.5,0.3,0.1). The models, which were computed with Z = 0.015 and f = 0.00, are marked in Fig. 2 with coloured dots.