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 language | English |
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Title of host publication | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 185-189 |
Number of pages | 5 |
Volume | 2017-October |
ISBN (Electronic) | 9781538616321 |
DOIs | |
Publication status | Published - 2017 Dec 7 |
Event | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 - New Paltz, United States Duration: 2017 Oct 15 → 2017 Oct 18 |
Other
Other | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 |
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Country | United States |
City | New Paltz |
Period | 17/10/15 → 17/10/18 |
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