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A Novel Feature for Nasalised Vowels and Characteristic Analysis of Nasal Filter

机译:鼻音元音的新特征及鼻音过滤器的特性分析

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Nasal tract is an important part of our vocal tract system. It provides major impact for production of nasalised and hypernasal speech. Despite it's huge importance, the effect of nasal tract is not yet largely studied. This work is done with a motivation that, understanding characteristics of nasalised vowels and nasal filter will help in detecting nasalised speech. We have designed a device to separate nasal murmur from oral speech, when nasalised speech is spoken. In this work we have analysed speech data collected from different speakers. Firstly we have analysed nasalised vowels and found a novel feature for nasalised vowels. Then, various signal processing techniques are used to analyse the variability of nasal filter for different nasalised vowels. It is found that the nasal filter, which is the reason for nasalisation of vowels, is invariant across different nasalised vowels. Nasalised speech are produced when the nasal tract gets coupled with vocal tract. When the effect of coupling is experimented from a signal processing point of view, we found that it has an effect of addition.
机译:鼻道是我们声道系统的重要组成部分。它对鼻音和鼻音的产生产生重大影响。尽管非常重要,但尚未广泛研究鼻腔的作用。进行这项工作的动机是,了解鼻腔元音和鼻腔过滤器的特性将有助于检测鼻腔话音。我们设计了一种可以在说出鼻腔话语时将鼻腔杂音与口头言语区分开的装置。在这项工作中,我们分析了从不同说话者那里收集的语音数据。首先,我们分析了鼻腔元音,发现了鼻腔元音的一个新特征。然后,使用各种信号处理技术来分析针对不同鼻音元音的鼻音过滤器的可变性。发现作为鼻元音鼻化的原因的鼻过滤器在不同的鼻化元音之间是不变的。当鼻道与声道耦合时会产生鼻音。从信号处理的角度对耦合效果进行实验时,我们发现它具有加法效果。

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