Pulse widths broadened due to ISM scattering in the frequency range at which the role of pulse broadening turns from crucial to negligible. The resulting width W₁₀ is plotted considering P = 10 ms (blue dashed lines) and P = 50 ms (green dash-dotted lines) for intrinsic duty cycles D_int = 10% (top panel) and D_int = 50% (bottom panel). The pulse broadening timescale τ_d is plotted with a solid indigo line. Horizontal lines mark 75% of period, and vertical lines indicate the ν_c where the pulse widths cross this limit.