Envelope (waves)

Top and bottom envelope functions for a modulated sine wave.

A modulated wave resulting from adding two sine waves of nearly identical wavelength and frequency.

Dispersion relation ω=ω(k) for some waves corresponding to lattice vibrations in GaAs.[6]

Electron probabilities in lowest two quantum states of a 160Ǻ GaAs quantum well in a GaAs-GaAlAs heterostructure as calculated from envelope functions.[8]

In physics and engineering, the envelope function of an oscillating signal is a smooth curve outlining its extremes. The envelope thus generalizes the concept of a constant amplitude. The figure illustrates a modulated sine wave varying between an upper and a lower envelope. The envelope function may be a function of time, space, angle, or indeed of any variable.

单词	Wave envelope
释义	Wave envelope 英语百科 Envelope (waves) In physics and engineering, the envelope function of an oscillating signal is a smooth curve outlining its extremes. The envelope thus generalizes the concept of a constant amplitude. The figure illustrates a modulated sine wave varying between an upper and a lower envelope. The envelope function may be a function of time, space, angle, or indeed of any variable.
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Wave envelope

Envelope (waves)