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Definition of Amplitude modulation

Babylon English

broadcasting through variations in the width of the radio wave (Electricity)
Amplitude modulation Definition from Science & Technology Dictionaries & Glossaries
Telecommunication Standard Terms
Modulation in which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal . (188 ) Note: Amplitude modulation implies the modulation of a coherent carrier wave by mixing it in a nonlinear device with the modulating signal to produce discrete upper and lower sidebands, which are the sum and difference frequencies of the carrier and signal. The envelope of the resultant modulated wave is an analog of the modulating signal. The instantaneous value of the resultant modulated wave is the vector sum of the corresponding instantaneous values of the carrier wave, upper sideband , and lower sideband. Recovery of the modulating signal may be by direct detection or by heterodyning.
AJA_RF Technical and TestTerminology
A type of modulation in which the amplitude of the carrier is varied above and below its unmodulated value by an amount proportional to the amplitude and frequency of the modulating signal.
Dictionary of Automotive Terms
A type of radio wave in which the amplitude changes rather than the frequency.
See frequency modulation.
Abbreviation Airbus A340
Amplitude Modulation: This type of modulation for boardcast systems modulates the amplitude of a carrier signal to transmit data.
Fiber Optics, Optical Networking Terms
A transmission technique in which the amplitude of t carrier is varied in accordance with the signal.
Amplitude modulation Definition from Computer & Internet Dictionaries & Glossaries
Electronic Music Glossary
A change in the level of a signal. For example, if a Voltage Controlled Amplifier (VCA) were being modulated by a Low Frequency Oscillator (LFO), the result would be a periodic increase and decrease in the audio level of the signal. In musical terms this would be referred to as Tremolo. The abbreviation of Amplitude Modulation is AM.
Amplitude modulation Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. In amplitude modulation, the amplitude (signal strength) of the carrier wave is varied in proportion to the waveform being transmitted. That waveform may, for instance, correspond to the sounds to be reproduced by a loudspeaker, or the light intensity of television pixels. This technique contrasts with frequency modulation, in which the frequency of the carrier signal is varied, and phase modulation, in which its phase is varied.

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Amplitude modulation Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Amplitude modulation Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

1. modulation of the amplitude of the (radio) carrier wave
(synonym) AM
(hypernym) modulation