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The Sound That Defined an Era - The Atlantic

Stashed in: Science!, Teh Internets, History of Tech!, @alexismadrigal, Sounds!

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"A phone line carries only the small range of frequencies in which most human conversation takes place: about 300 to 3,300 hertz," Glenn Fleishman explained in the Times back in 1998. "The modem works within these limits in creating sound waves to carry data across phone lines." What you're hearing is the way 20th century technology tunneled through a 19th century network.

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