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声像距离是声像位置的重要信息,为了完整地描述重建声场中感知声像位置,需在虚拟声场中重建出声像距离。本文基于人耳对距离的感知机理,将镜像法引入波场合成技术中,通过模拟反射声来控制感知声像距离。基于“比较判断律”的主观测听实验表明:通过模拟房间反射声受试者更明显地感受到声像距离的变化,并且变化规律与人耳对距离的感知机理相符合。因此在基于波场合成的声重放系统中,通过模拟反射声和有效地控制反射声能量可以准确地重建出声像距离。
The sound image distance is the important information of the sound image position. In order to describe the position of the sound image in the reconstruction sound field completely, the sound image distance must be reconstructed in the virtual sound field. Based on the perception mechanism of the human ear to distance, this paper introduces the image method into the wave field synthesis technology and controls the perceived sound image distance by simulating the reflected sound. The subjective listening experiments based on the “comparative judgment law” show that the subjects perceived the change of the sound image distance more clearly by simulating the reflex of the room, and the change rule is consistent with the perception mechanism of the human ear to the distance. Therefore, in the acoustic reproduction system based on wavefield synthesis, the sound image distance can be accurately reconstructed by simulating the reflected sound and controlling the reflected acoustic energy effectively.