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 … See more

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

• Atmospheric temperature § Temperature range
• Body thermal amplitude
• Complex amplitude
• Pitch (music)
• Wave height 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 remains analogous to this simple case. 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 modulating the loudness of the sound as well. It makes … See more