Assertion: raven's sound | /r/CapableOf | lull in air pressure
Facets:
value: over time
type: TEMPORAL
Source sentences:
text: Waveformsfor sound, a graph displaying the change in air pressure (along the y-axis) over time (along the x-axis), the higher the air pressure the louder the sound, for example, show the peaks and lulls in air pressure over time—