TY - GEN
T1 - Extended sound field recording using position information of directional sound sources
AU - Wakayama, Keigo
AU - Trevino, Jorge
AU - Takada, Hideaki
AU - Sakamoto, Shuichi
AU - Suzuki, Yoiti
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/7
Y1 - 2017/12/7
N2 - We propose a method that can record extended sound fields generated by sound sources with arbitrary directivity. Sound field recordings given as a spherical harmonic expansion are valid within a region limited by the highest expansion order. In current methods, multiple spherical microphone arrays are used for recording sound fields over large regions. Previously, we proposed a method to take advantage of the approximate knowledge of the sound source position to synthesize sound field anywhere in space from a single microphone array recording using a translation operator. This method assumes only omni-directional sound sources in the definition of the translation operator. The present research deals with the problem of extending previous results to sound sources with arbitrary radiation directivity patterns. A new translation operator is calculated taking into account that complex sound sources can be approximated as a collection of multipoles. The results of numerical simulations and actual measurements show that the proposed multipole translation operator can effectively synthesize extended sound field information from a single spherical microphone array recording.
AB - We propose a method that can record extended sound fields generated by sound sources with arbitrary directivity. Sound field recordings given as a spherical harmonic expansion are valid within a region limited by the highest expansion order. In current methods, multiple spherical microphone arrays are used for recording sound fields over large regions. Previously, we proposed a method to take advantage of the approximate knowledge of the sound source position to synthesize sound field anywhere in space from a single microphone array recording using a translation operator. This method assumes only omni-directional sound sources in the definition of the translation operator. The present research deals with the problem of extending previous results to sound sources with arbitrary radiation directivity patterns. A new translation operator is calculated taking into account that complex sound sources can be approximated as a collection of multipoles. The results of numerical simulations and actual measurements show that the proposed multipole translation operator can effectively synthesize extended sound field information from a single spherical microphone array recording.
KW - Sound field recording
KW - higher-order ambisonics
KW - multipole translation operator
KW - spherical harmonics
KW - spherical microphone array
UR - http://www.scopus.com/inward/record.url?scp=85042381845&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85042381845&partnerID=8YFLogxK
U2 - 10.1109/WASPAA.2017.8170020
DO - 10.1109/WASPAA.2017.8170020
M3 - Conference contribution
AN - SCOPUS:85042381845
T3 - IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
SP - 185
EP - 189
BT - 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
Y2 - 15 October 2017 through 18 October 2017
ER -