| Abstract | We propose a unified and simple approach for capturing andrecreating 3D sound fields by exploring the reciprocity prin-
ciple that is satisfied between the two processes. Our ap-
proach makes the system easy to build, and practical. Us-
ing this approach, we can capture the 3D sound field by a
spherical microphone array and recreate it using a spheri-
cal loudspeaker array, and ensure that the recreated sound
field matches the recorded field up to a high order of spheri-
cal harmonics. A design example and simulation results are
presented. For some regular or semi-regular microphone
layouts, we design an efficient parallel implementation of
the multi-directional spherical beamformer by using the ro-
tational symmetries of the beampattern and of the spherical
microphone array. This can be implemented in either soft-
ware or hardware. A simple design example is presented
to demonstrate the idea. It can be easily adapted for other
regular or semi-regular layouts of microphones.
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