Room Impulse Response Simulation Based on Equal-area Ray Tracing

Sound rendering are frequently used to enhance the sense of immersion in virtual environments and multimedia applications. For this purpose, this paper proposes a ray tracing method based on equal-area distribution to simulate room impulse response (RIR). It is efficient and accurate to get the direction of arrival of the direct sound and early reflections. An equal-area distribution was adopted in the process of the sound source emitting. In order to optimize the sound source directivity, the direct sound and early reflections of RIR were mainly concerned. In our experiment, the RIR produced by ROOMSIM was set a reference. In addition, Monte Carlo method of equal-angle distribution was also presented as a comparison. Our proposed equal-area ray tracing (EART) can get a better result for early reflection and later reverberation.