Transmission spectra of He 10830 and Hα lines for the models with different turbulence velocities and limb-darkening laws. The solid, dash-dotted, and dashed lines represent the cases of the nominal models, the models including the turbulence effect with a velocity of 0.5 to 1.5 times the speed of sound c_s, and the model with a constant stellar surface brightness (I_ν = constant). The gray lines with error bars are the observation data from Czesla et al. (2022).