Assertion: megaphone | /r/CapableOf | amplify human voice
Facets:
value: very efficiently
type: MANNER
value: by directing it
type: MANNER
Source sentences:
text: Also known as a bullhorn, blowhorn, or a speaking trumpet, a megaphone is a handheld device that makes it possible to amplify the human voice by directing it in a specific direction.
text: Megaphones from MONACOR amplify the human voice very efficiently, so that the device is easy to understand even over long distances in squares.
text: Megaphones are an effective means to amplify the human voice.