Advertisement
Advertisement
amplitude modulation
noun
- one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal AbbreviationAMam Compare frequency modulation
- a wave that has undergone this process
amplitude modulation
- A method of transmitting signals, such as sound or digital information, in which the value of the signal is given by the amplitude of a high frequency carrier wave. In AM radio transmission, for example, the signal to be carried is a sound wave, and its increasing and decreasing value is reflected in the increasing and decreasing amplitude of the radio frequency carrier wave. In fiber optics, the carrier wave is a beam of light.
- Compare frequency modulation
amplitude modulation
- A type of radio signal in which the amplitude, or strength, of a radio wave is varied in order to carry information from a transmitter to a receiver. ( Compare frequency modulation (FM) .)
Discover More
Example Sentences
Examples have not been reviewed.
It has been well documented that a song's volume, or loudness, over time -- what's known as "amplitude modulation" -- is relatively steady at 1-2 Hz.
From
AM stands for amplitude modulation, used to transmit information in a radio wave.
From
The difference between AM, or amplitude modulation, and FM, or frequency modulation, involves how sound waves are encoded into a signal that can be picked up by receivers.
From
At the time all radio was AM, which stands for “amplitude modulation.â€
From
Pushing them up or down was called amplitude modulation: changing the loudness.Â
From
Advertisement
Advertisement
Advertisement
Advertisement
Browse