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Two Physical Models for Spatially Extended Virtual Sound Sources

We present physical models for the sound field radiated by plates of finite size and spheres vibrating in higher modes. The intention is obtaining a model that allows for controlling the perceived spatial extent of a virtual sound source in model-based sound field synthesis. Analytical expressions for the radiated sound fields are derived and simulations of the latter are presented. An analysis of interaural coherence in a virtual listener, which has been shown to serve as an indicator for perceived spatial extent, provides an initial proof of concept.

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