About: http://webisa.webdatacommons.org/41335292

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	With this configuration, noise at frequencies other than the frequency of the modulating wave is cut off from the output signals, so that accurate signals without noise can be obtained.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com