About: http://webisa.webdatacommons.org/35999891

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	In practical use, speakers are sometimes used as microphones in such applications as intercoms or walkie-talkies, where high quality and sensitivity are not needed.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com