Assertion: air horn | /r/ObjectUse | used on ship
Facets:
Source sentences:
text: Larger air horns used on ships and foghorns function similarly to a whistle; instead of a diaphragm the air escapes from a closed cylindrical resonator chamber through a precisely shaped slit directed against a knife edge (fipple).
text: The air horns used on trains and ships are quite large, and capable of generating a formidable sound.