Abstract: Mobile phone voice has become a popular form of voice encountered in forensic voice identification. In the study, voice characteristics of different mobile phone communication networks, different mobile phone communication connections and different mobile phones were investigated. It was found that compared with direct recording, mobile phone voice changes in high and low frequency information, formant frequency, voice quality and speech rhythm. It was also found that voice changes are different for different communication conditions. The influence of mobile phone communication on forensic voice identification was discussed.

Key words: voice identification, mobile phone, voice spectrogram, frequency response

摘要： 当前,手机通话语音已成为司法语音鉴定中最为常见的一种语音形式。本研究从手机通信系统的信道特点出发,分析手机通话语音的声谱特点和共振峰频率变化等情况;同时还比较了不同通话网络、不同通话方式及不同手机的通话语音特点。实验发现,手机通话语音与直接录音语音有明显的变化,主要表现在高低频信息的带宽滤波效应、高低频共振峰的漂移、语音质量、音色、韵律特征等方面;还发现,不同手机通话条件下的语音变化程度不同。最后,讨论了手机通话语音变化对说话人鉴定的影响及鉴定中的注意事项。

关键词: 说话人鉴定, 手机, 声谱, 频率响应