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The Century-Old Machine That Gave Us MP3s and JPEGs

Back in 1894, Olaus Henrici invented a machine called the Harmonic Analyser. Way ahead of its time, it could pick out all the individual frequencies that make up complex sound waves—a technique we now rely on for everything from compressed audio to digital images. Read More >>

Police Can Timestamp Any Audio Recording From Background Interference Alone

A team of forensic researchers from the Metropolitan Police in London, claim to be able to accurately timestamp any audio recording—using just the background electrical hum present in any digital recording. Read More >>