Development and analysis of an International Speech Test Signal (ISTS)
Development and analysis of an International Speech Test Signal (ISTS)
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DOI：
10.3109/14992027.2010.506889
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发表时间：
2010-12-01
影响因子：
2.7
通讯作者：
Kollmeier, Birger
中科院分区：
文献类型：
--
作者：
Holube, Inga;Fredelake, Stefan;Kollmeier, Birger
为了分析助听器对语音的处理，一个标准的测试信号是必要的，它允许可重复的测量条件，并具有尽可能多的自然语音最相关的特性，例如平均语音频谱，调制频谱，基频的变化及其适当的谐波，以及不同频段的调制。现有的人工信号不能充分满足这些要求。此外，自然说话者的录音只代表一种语言，因此不被国际接受。为此，开发了国际语音测试信号（ISTS）。它是基于自然录音，但很大程度上是不可理解的，因为分割和混音。当使用信号进行助听器测量时，设备的增益可以用语音电平分布的不同百分位数来描述。主要目的是将该测试信号包含在新的助听器标准（IEC 60118-15）的新的测量方法中。
For analysing the processing of speech by a hearing instrument, a standard test signal is necessary which allows for reproducible measurement conditions, and which features as many of the most relevant properties of natural speech as possible, e. g. the average speech spectrum, the modulation spectrum, the variation of the fundamental frequency together with its appropriate harmonics, and the comodulation in different frequency bands. Existing artificial signals do not adequately fulfill these requirements. Moreover, recordings from natural speakers represent only one language and are therefore not internationally acceptable. For this reason, an International Speech Test Signal (ISTS) was developed. It is based on natural recordings but is largely non-intelligible because of segmentation and remixing. When using the signal for hearing aid measurements, the gain of a device can be described at different percentiles of the speech level distribution. The primary intention is to include this test signal with a new measurement method for a new hearing aid standard (IEC 60118-15).