Figure 2
From: Acoustic Illusion near Boundaries of Arbitrary Curved Geometry
Numerical demonstrations showing the effectiveness of the designed devices.
Acoustic pressure fields (a) in physical spaces (an aluminum cylinder covered by the illusion device), (b) in virtual spaces (only the inhomogeneous illusion object placed in the corner), (c) in physical spaces (an aluminum cylinder covered by the illusion device), (d) in virtual spaces (only background medium with the corner), (e)–(h) the corresponding results for 1.7 kHz. The orange regions represent the sound hard boundaries and the proposed illusion cloak is placed within the regions surrounded by red lines. The restoring media is highlighted by yellow lines.
