Assertion: sound wave | /r/CapableOf | leave the aircraft
Facets:
value: at a certain frequency
type: TEMPORAL
Source sentences:
text: In the case of an aircraft travelling at high subsonic speed, regions of air around the aircraft may be travelling at exactly the speed of sound, so that the sound waves leaving the aircraft pile up on one another, similar to a traffic jam on a motorway.
text: We believe that at a certain frequency the sound waves will displace enough air and cool the flame enough to put out the candle.