Figure 3
From: Three-dimensional broadband acoustic illusion cloak for sound-hard boundaries of curved geometry
Numerical demonstrations in the symmetric plane of the structure, showing the effectiveness of the illusion cloak.
Acoustic pressure amplitude fields (a) in the target illusion space, (b) disturbed by the small round table and the bowl-like sound hard boundary, (c) for the table covered by the cloak. The white object is the table and the proposed cloak is placed within the regions surrounded by red lines.
