Extended sound field recording using position information of directional sound sources

Keigo Wakayama, Jorge Alberto Trevino Lopez, Hideaki Takada, Shuichi Sakamoto, Yoiti Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages185-189
Number of pages5
Volume2017-October
ISBN (Electronic)9781538616321
DOIs
Publication statusPublished - 2017 Dec 7
Event2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 - New Paltz, United States
Duration: 2017 Oct 152017 Oct 18

Other

Other2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
CountryUnited States
CityNew Paltz
Period17/10/1517/10/18

Keywords

  • higher-order ambisonics
  • multipole translation operator
  • Sound field recording
  • spherical harmonics
  • spherical microphone array

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

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