What type of evidence is primarily examined through voice analysis?

Voice analysis is specifically focused on evaluating audio recordings, which contain vocal data. This type of evidence allows forensic experts to analyze various aspects of a voice, including pitch, tone, frequency, speech patterns, and even emotional cues. These characteristics can help in identifying speakers, confirming identities, or providing insights into the circumstances surrounding a spoken statement.

In contrast, written documents are analyzed in terms of handwriting or text content, video footage is reviewed for visual information and context, and physical objects may be subject to analysis regarding their material properties or fingerprints. Therefore, the focus of voice analysis is distinctly on audio recordings, making that the appropriate choice for this question.