Abstract

Speech science has a storied and illustrious past. Many studies are conducted for research on speech and voice acoustics, which focuses on speech. The human voice is our most basic and self contained instrument. When it comes to voice processing, the source filter paradigm may be used. It’s common to think of the voice as having two distinct processes: one that produces the initial tone and another that produces the final tone. This is done in order to create a speaker’s identity by providing an accurate phonetic profile of that individual. Other related fields include improving low quality audio files and verifying disputed recordings to see whether they have been manipulated, edited, or otherwise tampered with. In contrast, a digital recording samples the transduced waveform and transforms each sample into a binary number code similar to that used by computers. Speech analysis was also used in the investigation of recordings allegedly made by Osama bin Laden, the world’s most wanted terrorist. This research will discuss if voice changer apps can be used to mask one’s voice. There have been several instances where the perpetrator has used these apps to alter their speech. This research looks at how the characteristics of any voice can be altered or not by the use of these apps, how they function, and how they affect voice recognition. This paper also examines whether these apps really assist the perpetrator in eluding voice recognition experts.

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