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A novel procedure for direct-method measurement of the full-matrix Speech Transmission Index

机译：全矩阵语音传输指标的直接方法测量的新方法

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When measuring the Speech Transmission Index (STI), until now one had to choose between two alternatives: impulse-response based full STI measurements (indirect method), or measurements based on modulated STIPA signals (direct method). Limitations apply when using either method. A novel procedure is proposed to measure the full STI through the direct method. The procedure combines advantages of indirect full STI measurements and direct STIPA measurements, completing a full STI measurement in 65.52 seconds. Similar to STIPA, the test signal is simultaneously modulated with 2 modulation frequencies per octave band. However, a rotation scheme is applied that uses a different set of modulation frequencies during different stages of the measurement, ending up with a full matrix (7 octaves × 14 modulation frequencies).
机译：在测量语音传输索引（STI）时，直到现在必须在两个替代方案中选择：基于脉冲响应的完整STI测量（间接方法）或基于调制的STIPA信号的测量（直接方法）。使用任一方法时，限制适用。提出了一种新的程序来通过直接方法测量完整的STI。该过程结合了间接全STI测量和直接STIPA测量的优点，在65.52秒内完成了完整的STI测量。类似于STIPA，测试信号同时用每个八度音频带的2个调制频率调制。然而，应用旋转方案，其在测量的不同阶段期间使用不同的调制频率，以完整矩阵（7八八八八×14调制频率）结束。

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