Assertion: clarinet | /r/CapableOf | act as closed pipe system
Facets:
Source sentences:
text: Most instruments overblow at two times the speed of the fundamental frequency (the octave), but as the clarinet acts as a closed pipe system, the reed cannot vibrate at twice its original speed because it would be creating a 'puff' of air at the time the previous 'puff' is returning as a rarefaction.