音强斜率特性区别同卵双胞胎语音的实验研究

Abstract

为了寻找司法话者识别中区别同卵双胞胎语音的有效参量，该文利用音节音强的斜率特性对同卵双胞 胎语音进行了实验研究。结果发现，在 90% 的置信度下，所有实验的双胞胎语音均能够被音节音强斜率予以 区别，并且音强下降斜率的区别力明显高于音强上升斜率的区别力。因此得出结论，音节音强的斜率特性具有 比音节间相对音强与相对时长二者联合检验更强的区别力，可以作为区别同卵双胞胎语音的有效参量。
In this paper, the slope characteristics of syllable intensity are used to find effective parameters to distinguish identical twins’ speech in forensic speaker comparison. It is found that at 90% confidence, the twins’ speech of all experiments can be distinguished by the syllable intensity slopes, and the difference in the negative slope is significantly higher than the difference in the positive slope. Therefore, it is concluded that the slope characteristics of the syllable intensity have a stronger discriminating power than the joint test of the relative intensity and the relative duration between the syllables, and can be used as an effective parameter for distinguishing the identical twins’ voices.