Simulation of combined head and room impulse response based on sound ray tracing in frequency domain

With the requirement of auditory and rendering in virtual environments, the sound field reproduction of room acoustics is significantly in demand. In this paper, we propose a geometrical ray tracing method in frequency to simulate combined head and room impulse response (CHRIR) as an alternative to simulate room impulse (RIR) and head-related transfer function (HRTF) separately. We adopt KEMAR mannequin with approximate size to simulate CHRIR in an enclosure room. And we implement the simulation of CHRIR in Unity 3D which takes charge of constructing or loading the designed model and performing the CHRIR simulations. Finally, auralization in room acoustics is created by the convolution of an anechoic audio signal with the simulated CHRIR.