PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The signals monitored are preferably the microphone signal, i.e. the electrical signal produced by the microphone in response to the acoustic pressure wave impinging thereon, and the electrical noise cancelling signal produced in the feedbback loop, which is usually the speaker drive signal, i.e. the electrical signal used to drive the speaker or speaker drive circuit.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com