Assertion: sound wave's frequency | /r/HasProperty | denoted by greek letter
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Angular frequency, usually denoted by the Greek letter ω (omega), is defined as the rate of change of angular displacement, θ, (during rotation), or the rate of change of the phase of a sinusoidal waveform (notably in oscillations and waves), or as the rate of change of the argument to the sine function: