A psychoacoustic experiment is conducted to evaluate and compared the auditory distance perception in reflected sound field by using static and dynamic VAD. The binaural signals creased by a point source at different distances in a rectangular room are simulated. The contribution of direct sound to binaural signals is simulated by near-field head-related transfer function filters and a gain factor to account for the propagation attenuation of spherical surface wave. The contribution of early reflections up to the second order and later reverberation are respectively simulated by the image source method and Schroeder reverberation algorithm. The results of psychoacoustic experiment indicates that there are still significant differences between the perceived distances created by static VAD and these created by dynamic VAD in the simulated reflected condition, although the differences are not so large as those in the simulated free-field case. The results of dynamic VAD are more consistent with these of real sound source. Therefore, simulating reflections reduces the in-head-localization and thus improves the control of perceived distance in headphone presentation, but static VAD is still less effective in creating different distance perception. Dynamic VAD is still needed in the distance perception experiment for hearing researches even if simulated reflections are included. In practical applications, dynamic VAD is advocated for recreating virtual source at different distance.
