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T. Deppisch, and C. Frank, "Recording first-order Ambisonics with a differential array of two dual-diaphragm microphones," Engineering Brief 589, (2020 May.). doi: T. Deppisch, and C. Frank, "Recording first-order Ambisonics with a differential array of two dual-diaphragm microphones," Engineering Brief 589, (2020 May.). doi:
Abstract: First-order Ambisonics consists of four signals corresponding to one omnidirectional and three figure-of-eight polar patterns aligned with the Cartesian axes. We obtain these signals from a matched pair of dual-diaphragm microphones, where each diaphragm output is accessible individually. While the signals for figure-of-eight patterns in x- and y-direction are calculated directly from the microphone outputs, the z-direction figure-of-eight signal is calculated as di?erential signal from omnidirectional patterns of both microphones, resulting in low-frequency attenuation and a phase shift. We equalize the frequency response using a combination of a model-based IIR and a measurement-based FIR filter and provide an open-source plugin performing the processing.

@article{deppisch2020recording,
author={deppisch, thomas and frank, christoph},
journal={journal of the audio engineering society},
title={recording first-order ambisonics with a differential array of two dual-diaphragm microphones},
year={2020},
volume={},
number={},
pages={},
doi={},
month={may},} @article{deppisch2020recording,
author={deppisch, thomas and frank, christoph},
journal={journal of the audio engineering society},
title={recording first-order ambisonics with a differential array of two dual-diaphragm microphones},
year={2020},
volume={},
number={},
pages={},
doi={},
month={may},
abstract={first-order ambisonics consists of four signals corresponding to one omnidirectional and three figure-of-eight polar patterns aligned with the cartesian axes. we obtain these signals from a matched pair of dual-diaphragm microphones, where each diaphragm output is accessible individually. while the signals for figure-of-eight patterns in x- and y-direction are calculated directly from the microphone outputs, the z-direction figure-of-eight signal is calculated as di?erential signal from omnidirectional patterns of both microphones, resulting in low-frequency attenuation and a phase shift. we equalize the frequency response using a combination of a model-based iir and a measurement-based fir filter and provide an open-source plugin performing the processing.},}

TY - paper
TI - Recording first-order Ambisonics with a differential array of two dual-diaphragm microphones
SP - EP -
AU - Deppisch, Thomas
AU - Frank, Christoph
PY - 2020
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2020 TY - paper
TI - Recording first-order Ambisonics with a differential array of two dual-diaphragm microphones
SP - EP -
AU - Deppisch, Thomas
AU - Frank, Christoph
PY - 2020
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2020
AB - First-order Ambisonics consists of four signals corresponding to one omnidirectional and three figure-of-eight polar patterns aligned with the Cartesian axes. We obtain these signals from a matched pair of dual-diaphragm microphones, where each diaphragm output is accessible individually. While the signals for figure-of-eight patterns in x- and y-direction are calculated directly from the microphone outputs, the z-direction figure-of-eight signal is calculated as di?erential signal from omnidirectional patterns of both microphones, resulting in low-frequency attenuation and a phase shift. We equalize the frequency response using a combination of a model-based IIR and a measurement-based FIR filter and provide an open-source plugin performing the processing.