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A Parametric Model of Head-Related Transfer Functions for Sound Source Localization

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A simple and effective parametric model of head-related transfer functions is presented for synthesizing binaural sound for practical 3-D sound reproduction systems. The suggested model is based on a simplified time-domain description of the physics of wave propagation and diffraction, and the components of the model have a one-to-one correspondence with the main characteristics of the measured head-related transfer functions such as sound diffraction, delay, and reflection. Their parameters are derived from some sets of the measurements, and thus enable the model to fit significant perceptual impact hidden in head-related transfer functions. Finally simple subjective listening tests verify the perceptual effectiveness of the model. This will show some promise of permitting efficient implementation in real-world applications.

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