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Topic: Technology
Number of pages / Number of words: 3 / 648
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(Contrast this with frequency modulation, also commonly used for sound transmissions, in which the frequency is varied; and phase modulation, often used in remote controls, in which the phase is varied)

In the mid-1870s, a form of amplitude modulation—initially called "undulatory currents"—was the first method to successfully produce quality audio over telephone lines...


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Beginning with Reginald Fessenden's audio demonstrations in 1906, it was also the original method used for audio radio transmissions, and remains in use today by many forms of communication—"AM" is often used to refer to the mediumwave broadcast band.

Amplitude index

As with other modulation indices, in AM, this quantity, also called modulation depth, indicates by how much the modulated variable varies around its 'original' level...


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Geico Takes Varied Roads to Customers; Marketing Plan - Phase III Marketing Plan: Phase Iii Assess the reasons for the varied success of Pitt’s reforms up to 1793. Varied Development Marketing Plan:Phase III Phase in space B E C: The New Phase Of Matter Phase Resource Theory Of Varied Consume Choice Behavior And Its Importance Analysis Phase Radio Frequency Identification SDLC Phase 1 & 2 The Impact of Radio Frequency Identification Technology The State-of-Art of Radio Frequency Identification Management

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