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ER. M.. Benjamin, "A Second-Order Soundfield Microphone with Improved Polar Pattern Shape," Paper 8728, (2012 October.). doi: ER. M.. Benjamin, "A Second-Order Soundfield Microphone with Improved Polar Pattern Shape," Paper 8728, (2012 October.). doi:
Abstract: The soundfield microphone is a compact tetrahedral array of four figure-of-eight microphones yielding four coincident virtual microphones; one omnidirectional and three orthogonal pressure gradient microphones. As described by Gerzon, above a limiting frequency approximated by fc = pc/r, the virtual microphones become progressively contaminated by higher-order spherical harmonics. To improve the high-frequency performance, either the array size must be substantially reduced or a new array geometry must be found. In the present work an array having nominally octahedral geometry is described. It samples the spherical harmonics in a natural way and yields horizontal virtual microphones up to second order having excellent horizontal polar patterns up to 20 kHz.

@article{benjamin2012a,
author={benjamin, eric m.},
journal={journal of the audio engineering society},
title={a second-order soundfield microphone with improved polar pattern shape},
year={2012},
volume={},
number={},
pages={},
doi={},
month={october},} @article{benjamin2012a,
author={benjamin, eric m.},
journal={journal of the audio engineering society},
title={a second-order soundfield microphone with improved polar pattern shape},
year={2012},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={the soundfield microphone is a compact tetrahedral array of four figure-of-eight microphones yielding four coincident virtual microphones; one omnidirectional and three orthogonal pressure gradient microphones. as described by gerzon, above a limiting frequency approximated by fc = pc/r, the virtual microphones become progressively contaminated by higher-order spherical harmonics. to improve the high-frequency performance, either the array size must be substantially reduced or a new array geometry must be found. in the present work an array having nominally octahedral geometry is described. it samples the spherical harmonics in a natural way and yields horizontal virtual microphones up to second order having excellent horizontal polar patterns up to 20 khz.},}

TY - paper
TI - A Second-Order Soundfield Microphone with Improved Polar Pattern Shape
SP - EP -
AU - Benjamin, Eric M.
PY - 2012
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2012 TY - paper
TI - A Second-Order Soundfield Microphone with Improved Polar Pattern Shape
SP - EP -
AU - Benjamin, Eric M.
PY - 2012
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2012
AB - The soundfield microphone is a compact tetrahedral array of four figure-of-eight microphones yielding four coincident virtual microphones; one omnidirectional and three orthogonal pressure gradient microphones. As described by Gerzon, above a limiting frequency approximated by fc = pc/r, the virtual microphones become progressively contaminated by higher-order spherical harmonics. To improve the high-frequency performance, either the array size must be substantially reduced or a new array geometry must be found. In the present work an array having nominally octahedral geometry is described. It samples the spherical harmonics in a natural way and yields horizontal virtual microphones up to second order having excellent horizontal polar patterns up to 20 kHz.