Abstract
This paper describes a sound field reproduction method based on the spatial covariances. Wave surface control and convoluting the head related transfer function are major techniques for sound field reproduction. On the contrary, Takahashi and Tohyama, coauthors of this report, considered that the spatial impressions of a sound field, which we perceive through our ears, are reproduced by preserving the relative relationship between the observation points even if the wave surface is not completely controlled. Moreover, they proposed a new sound field reproduction method that can control the point‐to‐point covariance in a sound field [19th ICA, RBA15‐012]. In this work, we demonstrated about the differences between the covariance based method and the conventional methods, such as stereophonic playback and boundary surface control based on the Kirchhoff–Helmholtz equation. Then, we discussed the performances of several methods on the point of view of reproductivity and device cost.
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