About: http://webisa.webdatacommons.org/55693676

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	A pair of microphones support estimating the distance to the loudspeaker and an angle such as the azimuth angle in half a plane (front, back or either side) and estimating the sound velocity in a single direction.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com