Assertion: harmonica's reed | /r/CapableOf | beat against each other
Facets:
Source sentences:
text: In the case of a saxophone, which has a similar mouthpiece-reed combination to the clarinet, or an oboe, where double reeds beat against each other, the conical bore of these instruments gives their closed tube the properties of an open tube; when overblown, the pitch jumps an octave higher.