Numerical Simulation of Room Transfer Function Extrapolation using the Equivalent Source Method (original) (raw)

2020 IEEE 9th Global Conference on Consumer Electronics (GCCE), 2020

Abstract

Many methods of interpolation for the spatial impulse response have been proposed to improve the measurement efficiency. In this paper, we propose a method of extrapolating the room transfer functions including higher-order reflections using a small number of microphones. The direct sound and reflected sounds are represented by the sparse equivalent source method and the image source method. Experiments using a finite-difference time-domain (FDTD) simulation show that the proposed method has smaller errors than linear interpolation at low frequencies.

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