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A Comparison of Analog and Digital Spectrographs

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

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