The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). … See more

For symmetric periodic waves, like sine waves or triangle waves, peak amplitude and semi amplitude are the same.
In audio system measurements, telecommunications and others where the measurand is … See more

The units of the amplitude depend on the type of wave, but are always in the same units as the oscillating variable. A more general representation of the wave equation is more complex, but the role of amplitude r… See more

Amplitude envelope refers to the changes in the amplitude of a sound over time, and is an influential property as it affects perception of timbre. A flat tone has a steady state amplitude that remains constant du… See more

With waveforms containing many overtones, complex transient timbres can be achieved by assigning each overtone to its own distinct transient amplitude envelope. Unfortunately, this has the effect of modulati… See more