Large-scale outdoor sound field control

Abstract

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Gaussian processes for sound field reconstruction

“…The analysis, reconstruction, and visualization of sound fields over space are fundamental problems in acoustics that appear in many of its applications, such as sound field control. [1][2][3][4] A conventional approach to these problems is to measure the field at multiple locations and project these observations onto a finite, linear combination of spatial basis functions with unknown complex valued coefficients. It is common to choose the basis from known solutions to the Helmholtz equation, such as plane waves, [5][6][7][8] and spherical waves like in the equivalent source method (ESM).…”

Spatial reconstruction of sound fields using local and data-driven functions

“…The accurate description of the sound field in a room across space, time, and frequency is important in areas such as source localization, 1 sound field control, 2-4 auralization, 5 boundary characterization, 6,7 and sound field analysis. 8,9 Directly measuring the acoustic field in a large volume throughout the audible frequency range requires a considerable experimental effort, [10][11][12] which is often unfeasible in practice. Sound field reconstruction techniques, 8,[13][14][15][16][17] whereby acoustic field quantities can be interpolated and extrapolated from a limited set of observations, are an attractive alternative to direct measurements of the sound field.…”

Reconstruction of room impulse responses over extended domains for navigable sound field reproduction

“…Some approaches have been presented to effectively acquire the pressure field over a large aperture, e.g. by means of automated measurements [1], [2], IoT-enabled devices [3], by deploying large sensor networks throughout space [4], [5] or via remote sensing principles [6]- [9]. In most cases, the direct acquisition of the sound field with sufficient spatial resolution is not viable, due to excessive spatial sampling requirements.…”

“…Sound field reconstruction methods are a resourceful approach, as the enable the reconstruction -via interpolation and extrapolation, of a given sound field from a set of limited observations distributed throughout space. These methods are widely used in applications such as acoustic holography [10]- [12], sound field analysis [13], [14], or active control of sound [4], [15], [16].…”