amplitude
Sign in to saveThe amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a periodic function is sometimes called the amplitude.
AI overview
Amplitude measures how much a repeating wave or signal changes from its reference point—essentially the size of its fluctuations. It matters because it tells you the strength or intensity of waves and signals in everything from sound and light to electrical currents and vibrations.
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Article
13 sectionsContents
- Definitions
- Peak amplitude
- Peak-to-peak amplitude{{anchor|Peak-to-peak}}
- Semi-amplitude
- Root mean square amplitude
- Pulse amplitude
- Ambiguity
- Formal representation
- Units
- Amplitude envelopes
- Amplitude normalization
- See also
- References
The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a periodic function is sometimes called the amplitude.
==Definitions== thumb|A sine wave|sinusoidal curve {{ordered list| | list_style=list-style-position:inside; margin:0; | Peak amplitude (\scriptstyle\hat u), | Peak-to-peak amplitude (\scriptstyle2\hat u), | Root mean square amplitude (\scriptstyle\hat u/\sqrt{2}), | [[Wave period (not an amplitude) }}]]