About: http://webisa.webdatacommons.org/61375381

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	The operation of the present invention can be further improved by including an echo filter which provides an estimate of the echo or ring-around signal from the loudspeaker to the microphone.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com