扬声器的特性不匹配对虚拟声像的影响

本文从理论和实验上探讨了扬声器的特性不匹配对重放虚拟声像的影响。结果表明,用两扬声器进行虚拟听觉重放时,在某些频率段和虚拟声像角度,两扬声器间很小的幅频特性差异或相频特性差异都足以对虚拟声像方向产生明显的影响。扬声器特性的差异对前方范围的声像影响较小,但对侧向范围的声像影响较大,因而两扬声器的特性不匹配也是导致虚拟听觉重放时侧向声像位置畸变的重要原因之一。而在实际应用中要特别注意两扬声器的特性匹配,或者要用信号处理的方法对两扬声器的特性进行校正。

Effect of mismatched loudspeaker pair on virtual sound image

The effects of mismatched loudspeaker pair on virtual sound image are investigated by theoretical analysis and experiment.It is proved that,for virtual auditory display with two loudspeakers,at some frequency and direction,a slight magnitude or phase mismatch between the two loudspeakers will result in an obvious directional distortion of sound image.The effect of mismatched loudspeaker pair on the front sound image is trivial,but that on lateral sound image is notable.Therefore,a mismatch in the loudspeaker pair is one of the reasons for lateral image directional distortion in virtual auditory.In practical use of virtual auditory display,the loudspeaker pair should be matched carefully,or alternatively,equalized by signal processing.