Evaluation of a dual, concentric spherical microphone array for sound reproduction
Craig Jin
We present empirical evaluation of a third-order sound field recording and
reproduction system which has been designed to operate over a frequency range
of 900 Hz to 16 kHz. The system consists of a spherical microphone array (SMA)
with a dual, concentric rigid and open SMA (64 microphone in total) and also a
spherical loudspeaker array (32 loudspeakers) in a hemi-anechoic room. The
dual, concentric SMA was designed to improve the frequency range of the
standard SMA. We demonstrate how to combine information across the rigid and
open SMA to improve performance in contrast to ‘naïve’ sound reproduction using
either the rigid or open SMA alone. We present some measurements comparing
performance to an ideal third-order sound field recording and reproduction
system.
