Velocity dispersion computed in radial bins (black curve) and average local sound speed (blue curve), displayed as a function of radius at our last simulation snapshot (t ≈ 241 days, where t = 0 marks the birth of the protostar). The red curve is a fit of the inertial range, whose exponent is ≈9/10. The black dotted curve represents the turbulent energy flux (displayed in units of g s⁻³).