International Journal of Science and Technology (IJST)

Enhancement of crime voice sample by using ACCUSTECK Lab+ Audio Spectrometer

In this work, we aimed to improve the sound quality of the speech casually spoken by the criminals during a robbery at a factory using a voice spectrometer. The audio file included mentions of two local gangsters, who were later caught by the police, which helped advance the investigation. We achieved this objective by stretching the recorded speech over time, which allowed us to understand the names better. We have accomplished this task by elongating/expanding the recorded speech in the time scale/time domain, which led to the decipherment of names.