Figure 4
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 designed cloak.
Acoustic pressure amplitude fields (a) near the bowl-like sound hard boundary, (b) disturbed by the small round table, (c) for the table covered by the ideal cloak, (d) for the table covered by the reduced cloak. The white object is the table and the proposed cloak is placed within the regions surrounded by red lines.
