Assertion: ribbon microphone | /r/CapableOf | use nanofilm
Facets:
value: to produce a voltage
type: PURPOSE
Source sentences:
text: A ribbon microphone, also known as a ribbon velocity microphone, is a type of microphone that uses a thin aluminum, duraluminum or nanofilm of electrically conductive ribbon placed between the poles of a magnet to produce a voltage by electromagnetic induction.