Three different paths (Path1, Path2, and Path3) along which the time-distance plots were generated. The vertical dark blue structure at the left denotes the depleted part of the initial incoming wave, and the vertical red structure represents the enhanced part of the incoming wave (details of the amplitudes are shown in Fig. 1). The CH exhibits an asymmetric concave density structure and has a CH density of ρ_CH = 0.1. The background magnetic field is homogeneous and always points in the z-direction in this 2D setup.