Localizing Acoustic Energy in Sound Field Synthesis by Directionally Weighted Exterior Radiation Suppression

A method for synthesizing the desired sound field while suppressing the exterior radiation power with directional weighting is proposed. The exterior radiation from the loudspeakers in sound field synthesis systems can be problematic in practical situations. Although several methods to suppress the...

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Published in:Proceedings of the ... IEEE International Conference on Acoustics, Speech and Signal Processing (1998) pp. 321 - 325
Main Authors: Tomita, Yoshihide, Koyama, Shoichi, Saruwatari, Hiroshi
Format: Conference Proceeding
Language:English
Japanese
Published: IEEE 14.04.2024
Subjects:
Acoustics
directional weighting
exterior radiation
Loudspeakers
multizone sound field control
Optimization
personal audio
Signal processing
Sound field synthesis
Speech processing
ISSN:2379-190X
Online Access:Get full text
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Abstract A method for synthesizing the desired sound field while suppressing the exterior radiation power with directional weighting is proposed. The exterior radiation from the loudspeakers in sound field synthesis systems can be problematic in practical situations. Although several methods to suppress the exterior radiation have been proposed, suppression in all outward directions is generally difficult, especially when the number of loudspeakers is not sufficiently large. We propose the directionally weighted exterior radiation representation to prioritize the suppression directions by incorporating it into the optimization problem of sound field synthesis. By using the proposed representation, the exterior radiation in the prioritized directions can be significantly reduced while maintaining high interior synthesis accuracy, owing to the relaxed constraint on the exterior radiation. Its performance is evaluated with the application of the proposed representation to amplitude matching in numerical experiments.
AbstractList A method for synthesizing the desired sound field while suppressing the exterior radiation power with directional weighting is proposed. The exterior radiation from the loudspeakers in sound field synthesis systems can be problematic in practical situations. Although several methods to suppress the exterior radiation have been proposed, suppression in all outward directions is generally difficult, especially when the number of loudspeakers is not sufficiently large. We propose the directionally weighted exterior radiation representation to prioritize the suppression directions by incorporating it into the optimization problem of sound field synthesis. By using the proposed representation, the exterior radiation in the prioritized directions can be significantly reduced while maintaining high interior synthesis accuracy, owing to the relaxed constraint on the exterior radiation. Its performance is evaluated with the application of the proposed representation to amplitude matching in numerical experiments.
Author Tomita, Yoshihide
Saruwatari, Hiroshi
Koyama, Shoichi
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  givenname: Hiroshi
  surname: Saruwatari
  fullname: Saruwatari, Hiroshi
  organization: The University of Tokyo,Bunkyo-Ku,Tokyo,Japan,113-8656
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Snippet A method for synthesizing the desired sound field while suppressing the exterior radiation power with directional weighting is proposed. The exterior radiation...
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StartPage 321
SubjectTerms Acoustics
directional weighting
exterior radiation
Loudspeakers
multizone sound field control
Optimization
personal audio
Signal processing
Sound field synthesis
Speech processing
Title Localizing Acoustic Energy in Sound Field Synthesis by Directionally Weighted Exterior Radiation Suppression
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