Temporal evolution of the density wave profile (incoming and reflected wave) along Path1 (magenta) compared to the related time-distance plot of this interaction with a concave asymmetric CH. Panel a shows the initial density profile with an enhanced amplitude of ρ_Ampl = 1.1 and a CH density of ρ_CH = 0.1. Plot b is also represented as vertical green line in the time-distance plot at the bottom and shows that the incoming wave still moves towards the CH. Panel b shows that no part of the density profile reaches a value higher than the background density ρ₀ = 1.0. A similar situation is shown in panels h and i. These profiles are denoted in the time-distance plot as vertical black, pink, and red lines. The temporal evolution between panels e and j clearly shows that the first reflected wave part propagates through the depleted part of the incoming wave. Panel m shows that the amplitude of the reflected wave is able to reach a value that is more than twice higher than the density amplitude of the incoming wave. This large amplitude is also shown as the dark red structure in the time-distance plot below.