The spatial localization performance of moving sound binaural recording is compared with stationary sound one here. The acoustical dummy head used in binaural recording was designed by Communication University of China. The size of the dummy head was in accordance with the average physiological parameters of Chinese people. Three kinds of sound sources were recorded: static sound, radial-straightline-movement sound and crosswise-straightline-movement sound. Subjective listening experiment was made to compare the spatial localization performance of the moving sound with the stationary sound source. The result of the subjective test showed that the ratio of outside-of-head localization for crosswise-straightline-movement sound source was 13% higher than the stationary sound case. It indicates that when sound source is stationary, the sound image is often localized inside the head or on the scalp. Therefore, moving sound source may contribute to localize the sound image outside the head and weaken inside-the-head effect to some extent. However, the movement of sound source cannot reduce the front-back confusion and up-down confusion effectively. Besides, different movement styles of sound source will affect the localization accuracy, and the rate of accuracy was 9% higher when sound source moved linearly in crosswise direction than moved in radial direction.
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