Diagnostic diagram of [Ne v]14.3 μm/[Ne ii]12.8 μm × [Ne iii]15.5 μm/[Ne ii]12.8 μm ratios. The direction of increasing ionization parameter for dusty NLR models with the total pressure of P _tot/ k   10 ⁶ (dotted curve), 10 ⁷ (dashed curve), and 10 ⁸ (solid curve). Full triangles are SBs taken from Brandl et al. (2006), and full and empty circles are Sy 1 and Sy 2 of our and Gallimore et al. (2010) sample. Error bars are shown only for the 15 new AGNs; similar errors were found for the remaining objects.