Channel separation of crosstalk cancellation systems with mismatched and misaligned sound sources

摘要

Loudspeakers in virtual sound imaging systems are usually modeled as omnidirectional monopolesources. These models are, however, only an approximation for the low frequency range. This paperpresents an analytical model of crosstalk cancellation systems in a free field which takes intoaccount the scattering and spatial characteristics of the sound sources. Based on the proposed model,the effects caused by the spatial characteristics of the sound source and its misalignments on theperformance of the crosstalk cancellation system are studied numerically. It is found that althoughthe factors such as the directivity of the sound sources and the distance between the sound sourcesand receiver affect the performance of the system to a certain extent, the channel separation of thecrosstalk cancellation system, however, is most sensitive to the misalignment of the subtended angleof the sound sources. Therefore, if highly accurate binaural cues are required in practicalapplications, the type and characteristics of the playback sound sources, their locations, andorientations all should be considered carefully.