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Electrical network frequency analysis: dating recordings by power grid hum

IT·技术 · 2026-11-03 18:40

维基百科条目介绍ENF音频取证技术，通过比对录音中市电嗡鸣的频率变化与历史电网频率记录，判断录制时间并检测剪辑或篡改。

Source: en.wikipedia.org

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