Total vertical acoustic wave energy flux of the jacket modes inside an annular region surrounding the flux tube at z = −0.2 Mm. The inner radius of the annulus is given by the radius of the flux tube and the outer radius by the abscissa coordinate. Dotted line: 560 km radius; solid line: 370 km radius; dashed line: 170 km radius. The two latter cases are normalized to the energy flux of the tube waves at z = −0.2 Mm, while the 560 km case is normalized to the energy flux of the tube waves at z = −0.5 Mm.