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本文考虑了双耳相位差的高级近似,导出了在中频情况下也适用的具有更普遍意义的立体声声像定位公式。新的公式在低频时将简化为通常的正弦定理,而随着声音频率的增加,声像位置将与声音的频率有关。文中还给出了频率上限(1500Hz～1700Hz),当声音的频率高于此上限时,单靠双耳相位差就难以决定立体声的声像位置。文中最后还给出了上述理论的实验验证。
In this paper, a high-level approximation of the binaural phase difference is considered, and a more general stereo sound image localization formula that is also applicable at IF is derived. The new formula will be reduced to the usual sine law at low frequencies, and as the sound frequency increases, the position of the sound image will depend on the frequency of the sound. The article also gives the upper limit of frequency (1500Hz ~ 1700Hz), when the sound frequency is higher than the upper limit, the phase difference between the two ears alone is difficult to determine the stereo image position. Finally, the article also gives the experimental verification of the above theory.