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

机译：一种直接方法测量全矩阵语音传输指数的新方法

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摘要

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：在测量语音传输指数（STI）之前，到目前为止，人们只能在两种选择之间进行选择：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）。使用任何一种方法时都存在局限性。提出了一种新颖的方法来通过直接方法来测量完整的STI。该程序结合了间接完整STI测量和直接STIPA测量的优点，可在65.52秒内完成完整STI测量。与STIPA相似，测试信号以每个倍频程2个调制频率同时进行调制。但是，应用了一种旋转方案，该方案在测量的不同阶段使用一组不同的调制频率，最终得到一个完整的矩阵（7个八度×14个调制频率）。

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