Telephony: A Comprehensive and Detailed Exposition of the Theory and Practice of the Telephone Art (Classic Reprint) - Tapa blanda

Sinopsis

Excerpt from Telephony: A Comprehensive and Detailed Exposition of the Theory and Practice of the Telephone Art

Who can but admire the hardihood of invention which devised such slight means to realize the mathematical conception that if electricity is to convey all the delicacies of sound which distinguish articulate speech, the strength of its current must vary continuously as nearly as may be in simple proportion to the velocity of a particle of the air engaged in constituting the sound.

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