REGION-TO-REGION KERNEL INTERPOLATION OF ACOUSTIC TRANSFER FUNCTION WITH DIRECTIONAL WEIGHTING

Article Acoustics

Binaural rendering from microphone array signals of arbitrary geometry

Naoto Lijima et al.

Summary: The proposed method introduces a new way of binaural rendering using microphone array signals of arbitrary geometry. By utilizing harmonic analysis of infinite order, it allows for the flexibility of using arbitrarily placed microphones, and incorporates a spherical-wave-decomposition-based binaural rendering method to consider distance in measuring head-related transfer functions. The developed composite microphone array shows robustness against changes in listening position in the recording area, as indicated by experimental results including listening tests.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2021)

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Article Acoustics

Gaussian processes for sound field reconstruction

Diego Caviedes-Nozal et al.

Summary: This study explores the use of Gaussian process regression for sound field reconstruction, focusing on spatial correlation to improve accuracy and comparing it to traditional linear regression methods. The results demonstrate the advantages of using GPs in sound field analysis, particularly when prior knowledge is unavailable.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2021)

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Proceedings Paper Acoustics

Sound Field Reproduction With Weighted Mode Matching and Infinite-Dimensional Harmonic Analysis: An Experimental Evaluation

Shoichi Koyama et al.

Summary: This study evaluates the weighted mode matching method based on spherical wavefunction expansion of the sound field, comparing it with conventional pressure matching. The results indicate that weighted mode matching using expansion coefficients estimated by infinite-dimensional harmonic analysis outperforms pressure matching in experiments, especially with fewer microphones.

2021 IMMERSIVE AND 3D AUDIO: FROM ARCHITECTURE TO AUTOMOTIVE (I3DA) (2021)

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Article Acoustics

Spatial Active Noise Control Based on Kernel Interpolation of Sound Field

Shoichi Koyama et al.

Summary: A novel active noise control method based on kernel interpolation of sound field is proposed in this study, which allows for flexible array configurations and improved accuracy in sound field estimation. Experimental results show that the proposed method outperforms traditional multipoint pressure control methods in reducing regional noise levels.

IEEE-ACM TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING (2021)

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Article Engineering, Electrical & Electronic

Directionally Weighted Wave Field Estimation Exploiting Prior Information on Source Direction

Natsuki Ueno et al.

Summary: This study proposed a wave field estimation method utilizing prior information on source direction, formulating the wave field estimation problem as regularized least squares with the norm of the wave field used as a regularization term. The norm of the wave field, defined based on the weighting function reflecting prior information, resulted in a closed-form solution derived using theories on Hilbert spaces. Numerical experiments showed that the proposed method achieved higher estimation accuracy compared to current methods that do not incorporate prior information.

IEEE TRANSACTIONS ON SIGNAL PROCESSING (2021)

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Proceedings Paper Acoustics