Time domain is the analysis of mathematical functions, physical signals or time series of economic or environmental data, with respect to time. In the time domain, the signal or function's value is known for all real numbers, for the case of continuous time, or at various separate instants in the case of discrete time. An oscilloscope is a tool commonly used to visualize real-world signals in the time domain. A time-domain graph shows how a signal changes with time, whereas a frequency-domain graph shows how much of the signal lies within each given frequency band over a range of frequencies.
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Famous quotes containing the words time and/or domain:
“And you’re too fired up to go to sleep, you sit at the kitchen table. It’s really late, it’s really quiet, you’re tired. Don’t wanna go to bed, though. Going to bed means this was the day. This Feb. 12, this Aug. 3, this Nov. 20 is over and you’re tired and you made some money but it didn’t happen, nothing happened. You got through it and a whole day of your life is over. And all it is—is time to go to bed.”
—Claudia Shear, U.S. author. New York Times, p. A21 (September 29, 1993)
“While you are divided from us by geographical lines, which are imaginary, and by a language which is not the same, you have not come to an alien people or land. In the realm of the heart, in the domain of the mind, there are no geographical lines dividing the nations.”
—Anna Howard Shaw (1847–1919)