A COMPARISON OF ANALOG AND DIGITAL SPECTROGRAPHS

摘要

Analog spectrographic representations of voice recordings have had a fluctuant role in audio forensics. Althoughrecorded evidence has been admitted in court since 1959, forensics scientists today still struggle to establish analogspectrographic evidence used for voice identification as a solid, reliable scientific method. Media across the boardcontinue to converge on the digital format, and the spectrograph is no exception. Various computer programs alreadyexist to create spectrographs digitally. Their accuracy, usefulness, and viability as evidence in courtrooms remain inquestion, however. This paper is an investigation into these issues-- both the digital spectrograph as it relates to itsanalog counterpart and as it relates to other digital representations.