4.5 Article

Generative models for sound field reconstruction

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JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
卷 153, 期 2, 页码 1179-1190

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ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/10.0016896

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This study investigates the use of generative adversarial networks to reconstruct sound fields from experimental data. It demonstrates that generative models can improve the spatio-temporal reconstruction of a sound field by extending its bandwidth. The results show that these models can recover lost energy at high frequencies and have potential applications in computational acoustics.
This work examines the use of generative adversarial networks for reconstructing sound fields from experimental data. It is investigated whether generative models, which learn the underlying statistics of a given signal or process, can improve the spatio-temporal reconstruction of a sound field by extending its bandwidth. The problem is significant as acoustic array processing is naturally band limited by the spatial sampling of the sound field (due to the difficulty to satisfy the Nyquist criterion in space domain at high frequencies). In this study, the reconstruction of spatial room impulse responses in a conventional room is tested based on three different generative adversarial models. The results indicate that the models can improve the reconstruction, mostly by recovering some of the sound field energy that would otherwise be lost at high frequencies. There is an encouraging outlook in the use of statistical learning models to overcome the bandwidth limitations of acoustic sensor arrays. The approach can be of interest in other areas, such as computational acoustics, to alleviate the classical computational burden at high frequencies.

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