Background:The nature of voice as forensic evidence holds immense value.The voice examination is highly influenced by various factors such as recording devices,environmental factors,and individual health conditions be...Background:The nature of voice as forensic evidence holds immense value.The voice examination is highly influenced by various factors such as recording devices,environmental factors,and individual health conditions beyond the norm.The rapid advancement of technology has led to the evolution of numerous recording devices including tape-based recorders,reel-to-reel-based recorders,and analog tape recorders which have transitioned into digital recording media.The widespread accessibility of mobile phone devices,be it Android,iOS,or Feature phone,has significantly increased the prevalence of voice evidence in criminal cases.Aims and Objectives:This study aims to determine the optimal sampling rate of various recording devices in forensic voice analysis,conduct qualitative and statistical comparisons of voice acoustic parameters acrossAndroid,iOS,and feature mobile phones,and identify the most suitable mobile device for forensic voice analysis.Materials and Methods:Sixty voice samples from twenty individuals(10 males and 10 females)were recorded across three different recording devices and,then examined and analyzed using Goldwave and Praat software,and statistical analyses was conducted.Results:It was observed that only a few parameters jitter local,jitter ddp,harmonic mean autocorrelation,mean noise-to-harmonic ratio,mean harmonic-to-noise ratio,and intensity exhibited notable statistical differences among the voice samples recorded on different devices.Conclusion:It was concluded that while different devices displayed variations in numerical parameter values,the speaker’s individual characteristics in perceptual identification remained largely intact.Thus,recordings from these devices can be utilized for forensic voice comparison,analysis,and identification.展开更多
文摘Background:The nature of voice as forensic evidence holds immense value.The voice examination is highly influenced by various factors such as recording devices,environmental factors,and individual health conditions beyond the norm.The rapid advancement of technology has led to the evolution of numerous recording devices including tape-based recorders,reel-to-reel-based recorders,and analog tape recorders which have transitioned into digital recording media.The widespread accessibility of mobile phone devices,be it Android,iOS,or Feature phone,has significantly increased the prevalence of voice evidence in criminal cases.Aims and Objectives:This study aims to determine the optimal sampling rate of various recording devices in forensic voice analysis,conduct qualitative and statistical comparisons of voice acoustic parameters acrossAndroid,iOS,and feature mobile phones,and identify the most suitable mobile device for forensic voice analysis.Materials and Methods:Sixty voice samples from twenty individuals(10 males and 10 females)were recorded across three different recording devices and,then examined and analyzed using Goldwave and Praat software,and statistical analyses was conducted.Results:It was observed that only a few parameters jitter local,jitter ddp,harmonic mean autocorrelation,mean noise-to-harmonic ratio,mean harmonic-to-noise ratio,and intensity exhibited notable statistical differences among the voice samples recorded on different devices.Conclusion:It was concluded that while different devices displayed variations in numerical parameter values,the speaker’s individual characteristics in perceptual identification remained largely intact.Thus,recordings from these devices can be utilized for forensic voice comparison,analysis,and identification.
