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本文在分析双传声器──传递函数测量技术缺陷的基础上，提出了伪随机信号的三点测量技术。该技术很好地解决了双传声器──传递函数技术存在的两传声器间距不能为半波长整数倍的问题；采用伪随机信号解决了声场不一致问题以及采用单通道测量避免了双通道测量的不匹配问题。该技术在传统的驻波管中具有实际应用价值。
Based on the analysis of the shortcomings of the dual-microphone-transfer function measurement technique, this paper proposes a three-point measurement technique of the pseudo-random signal. This technique solves the problem that the two microphones can not be an integral multiple of half wavelength due to the dual microphone - transfer function technique. The problem of inconsistency of the sound field is solved by adopting the pseudo-random signal, and the mismatch of the two-channel measurement is avoided by adopting the single-channel measurement problem. The technology in the traditional standing wave tube has practical application value.