Fractional contribution of the acoustic cavity to the mode inertia for models 1, 2, and 3. Modes that have more than half of their energy trapped in the g₁ (resp. g₂) cavity are shown as filled red circles (resp. blue squares). Other modes are shown as filled black triangles. In the top panel, we also show I_p/I for the g₁-dominated modes of models 1th (purple downward triangles) and 1ov (green stars).