Fig. 2: The retrieval of the transmission matrix.
From: Scattering matrices of two-dimensional complex acoustic media
a Illustration of the problem setting. b Amplitude of the total pressure field in a complex medium illuminated by an acoustic plane wave, revealing a speckle-like sound field distribution, with a local magnification inset. c Real parts of the transmission matrices in the channel basis (upper left panel) and the point basis (lower left panel), respectively. The transmission matrix is then transformed into the point basis (channel basis) through basis conversion, as shown in the lower right panel (upper right panel).
