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The Effect of Head Diffraction on Stereo Localization in the Mid-Frequency Range

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In a previous paper, the present author described anomalous localization in intensity stereo at frequencies above the frequency at which the head is approximately one wavelength in diameter. Conventional analysis of stereo localization has usually depended on an asymptotic shadowless model of the head’s diffraction. Measurements of the ear signals heard by the subjects in localization experiments showed that there were large differences between what was predicted by the simple model, and what was found in actual circumstances. We present a simple model for the head’s diffraction in the range of 1200 Hz to 5000 Hz and show that it produces results which correspond more closely to real-world localization.

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