About: http://webisa.webdatacommons.org/304224709

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This invention relates to transducers that convert sound, vibration, or other forms of varying energy into electrical signals for transmission, storage, display, or analysis, such as microphones, pick-ups, and other audio transducers.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com